Foods like tofu, tempeh, edamame, miso soup, and soy milk are made from soy, a protein isolated from soybeans. 99 male test subjects being treated for infertility were found to have been on a continuous soy diet for three months. Hypogonadism and erectile dysfunction associated with soy product consumption. This was just a correlational study, meaning that people who eat soy may live longer because they are doing other things that are good for their health, such as eating a healthy diet or exercising several times per week. However, the reality is far more nuanced. However, most modern-day soy products are heavily processed, and contain large amounts of phyto-estrogens which have been shown to increase estrogenic effects in men. Soy, in general, is a healthy food product when consumed in its most natural form, but when soy is over-processed into food such as soy protein bars, soy-infused veggie sausages, and soy burgers, thats when these products are more questionable and can lead to digestive issues such as nausea, constipation, and bloating [20]. Soybeans contain a high concentration of a compound called isoflavones, a type of plant estrogen also known as phytoestrogen. These tend to have more unnecessary ingredients like sugar and salt, and if consumed in large amounts can lead to negative health effects like cardiovascular disease. Cancer Epidemiology Biomarkers & Prevention, 16(4), 829-833. doi:10.1158/1055-9965.epi-06-0882men. Just one tablespoon of soy sauce contains 2.3 grams of sodium! Too much of anything, even if its healthy, could have adverse side effects and lead to health problems. Its important to note that taking supplements such as isolated soy protein powders and pills for an extended period of time is not recommended and may cause health problems that are not found if eating large amounts of soy foods. No. Men in Indonesia and China with tofu in their diets were found to have lower memory functions and an increased risk of dementia (Horgervorst 2014). Sometimes the voice and actions can become feminine as well for some individuals. One of the best ways you can eat high-protein soy is as a replacement for animal proteins that can be higher in saturated fat (such as red meat)thats one reason why soy is considered a heart-healthy food. Numerous studies have shown that soy is an inferior source of protein and can have negative effects on men. Soy is often used as a protein source in vegan and vegetarian diets. Saturated Fat Consumption and Risk of Coronary Heart Disease and Ischemic Stroke: A Science Update.. But is soy bad for men? I'm a 15 year old male. Their consumption of soy protein on daily basis were exposing them to unanticipated and highly adverse effects of high levels of estrogen in their body. The American Cancer Society's dietary guidelines note that consumption of soy foods is not only safe but "may even lower breast cancer risk." Another study in the journal Nutrition & Metabolism has also shown that increased soy consumption correlates to a reduced risk of prostate cancer for men. Absolutely not! However, elevated levels of estrogen stunts muscle development, lowers testosterone, increases cortisol levels, causes gynecomastia, decreases libido, and even reduces sperm production. A study in 2007 provided male test subjects over the age of 18 two scoops (56g) of soy protein powder a day for 28 days. Soy is marketed as a protein source for men and women alike. A meta-analysis of 30 observational studies found that soy consumption is associated with a decreased likelihood of developing prostate cancer (8). An earlier 2021 meta-analyses of 38 clinical studies, published in Reproductive Toxicology (4), found that soy and its isoflavones also did not alter levels of total testosterone, free testosterone, or estrogens in meneven when eaten long-term at levels that exceed the amounts typically consumed in Asian cultures. Soy is high in estrogen. Not only do soybeans initiate the lowering of blood glucose levels, but isoflavone may help lower insulin resistance by improving the bodys tolerance for blood sugar and improving insulin sensitivity [17]. , U.S. National Library of Medicine, pubmed.ncbi.nlm.nih.gov/17413118/. Some supplement companies have started selling soy protein powders, such as soy protein isolate, to their customers. Soy foods also provide a lean source of protein. However, it should probably be avoided if your goal is to maximize your bodies own natural testosterone production. Soy protein also supports normal blood cholesterol levels and is a good choice of high-quality, plant-based protein for those wanting to increase muscle mass. If you have concerns about your hormone levels and want to know which foods to avoid that could lower testosterone, we have information on, or you can check out what we found out about, No. Appetite control and biomarkers of satiety with vegetarian (soy) and meat-based high-protein diets for weight loss in obese men: a randomized crossover trial. BJU international,113(5b), E119-E130, https://www.menshealth.com/nutrition/a19539170/soys-negative-effects/, https://www.sciencedirect.com/science/article/pii/0955286396000939, http://cebp.aacrjournals.org/content/16/4/829?ijkey=4c97212772ba82aaaf19f67890d4e7b88d76ccfa&keytype2=tf_ipsecsha, https://www.goldjournal.net/article/S0090-4295(07)02445-4/abstract, 5 ways to increase your testosterone before you need TRT , Moving Goal Posts- Testosterone Reference Ranges, Low Testosterone Increases Risk of Alzheimers, Treatment of Low Testosterone from grown Leydig Cells. However, there is a lot of real-world evidence that men who consume more soy products have higher estrogen levels than men who dont. For example, tofu, soy sauce and soy lattes are known to raise estrogen levels in men. The reason people say soy is bad for you is because it contains what are known as phytoestrogens. Soy and Estrogen: How Does It Affect Men? However, soy sauce still might not be the best food for you. The binding effect of isoflavone that mimics estrogen may help improve bone density, improve memory impairment, and reduce hot flashes in older women [7]. The Journal of Nutritional Biochemistry,7(9), 481-487. doi:10.1016/0955-2863(96)00093-9. During processing, microorganisms are added to break down the nutrients in the soy, increasing the protein levels and making it easier to digest. Clinical and Biological Activity of Soy Protein Powder Supplementation in Healthy Male Volunteers. Our goal is to provide you with the most scientifically accurate, unbiased, and comprehensive information regarding all research peptides and supplements. We also dont know the long-term effects of soy sauce on mens testosterone levels. 2016, www.ncbi.nlm.nih.gov/pmc/articles/PMC4793528/. Soybeans also include omega 6, omega 3, and polyunsaturated fats, which help lower cholesterol, all necessary for a healthy heart [12]. Still, some men worry that consuming phytoestrogens may reduce their testosterone levels. No, James Cameron, Testosterone is Not a Toxin You Should Vanquish. Clinical studies show no effects of soy protein or isoflavones on reproductive hormones in men: results of a meta-analysis, Association between consumption of soy and risk of cardiovascular disease: A meta-analysis of observational studies. Choose an answer to reveal what studies have found, Isoflavone, which is found in soy, can reduce hot flashes in menopausal women, Click on your choice to reveal the answer, Soy isoflavones shows to have a greater effect on people with hypertension, Get our weekly newsletter about the most recent publications and reviews in the Research shows that up to 100 mg of isoflavones (the equivalent to about four servings of whole soy foods per day) is safe (1). ; Although they contain phytoestrogens, soy foods do not increase the amount of estrogen in men or women. Soy is similar to alcohol in this respect its probably not that bad for you when consumed in small quantities. Soy was initially shown to negatively affect male rats and mice, including lowering testosterone, decreasing sperm count, and affecting litter size [9]. In other words: Eating a healthy diet that includes soy wont get you anywhere near the level of these men. Soybeans are a part of the legume family. Soy protein powder probably isnt your best bet. Soy: A Complete Source of Protein.. My parents feel bad for my parents feel sad because I haven't received anything and they want to buy me a computer. There is, in fact, no robust evidence that soy causes elevated estrogen levels in males or indeed, has any significant effect on hormone levels. The American journal of clinical nutrition,100(2), 548-558, Sutton, M., Hunn, C., Summers-Colquitt, R. B., Chen, S. H., Kavoussi, S. K., Kavoussi, K. M., & Kavoussi, P. K. (2018). https://www.ncbi.nlm.nih.gov/pubmed/17416779, https://www.ncbi.nlm.nih.gov/pubmed/20378106, http://www.lboro.ac.uk/service/publicity/news-releases/2008/104_tofu.html. Consumption of soy isoflavone enriched bread in men with prostate cancer is associated with reduced pro-inflammatory cytokines and immunosuppressive cells. ; Unless consumed in excess quantities, soy proteins are . Eat a variety of foods and protein sources. No. Vitale DC;Piazza C;Melilli B;Drago F;Salomone S; Isoflavones: Estrogenic Activity, Biological Effect and Bioavailability., European Journal of Drug Metabolism and Pharmacokinetics. Soy milk is a beverage that is made form soybeans the same legumes that are used to make tofu and other soy products. So, marinate and saut tofu as your main protein or toss a handful of edamame onto a salad. The authors point out that their research affirmed the conclusion of a 2010 meta-analysis (5) and that its unlikely that additional research will alter this conclusion.. Avoid soy supplements. Their testosterone levels increased 2 weeks after discontinuing soy consumption. Huang, Y., Pan, L., Xia, X., Feng, Y., Jiang, C., & Cui, Y. In fact, adding soy protein to a healthy diet reacts positively with the microorganisms working within the digestive tract and stomach to create a healthier environment that contributes to a healthy gut, Hamilton-Reeves JM;Vazquez G;Duval SJ;Phipps WR;Kurzer MS;Messina MJ; Clinical Studies Show No Effects of Soy Protein or Isoflavones on Reproductive Hormones in Men: Results of a Meta-Analysis.. Men in Asian countries, especially Japanese men, consume the most soybeans globally, and some eat anywhere between 60-120 grams of soy per day without any adverse side effects. That's true regardless of gender. Soy, Soy Foods and Their Role in Vegetarian Diets.. The key word here is weakly. Start by replacing meat with tofu or regular milk with soy milk a couple times per week. But there was one study conducted on humans that resulted in hormonal disturbances. and packed with nutrients like fiber, iron, vitamins, minerals, and antioxidants, Only 10%-15% of fat from soy is saturated fat, lowering your risk of heart disease. Health Benefits of Phyllanthus Niruri- Gale of the Wind. 1 1.Soy for Men: The Good, the Bad, and the Ugly - Fitbit Blog; 2 2.Straight Talk About Soy | The Nutrition Source; 3 3.Is Soy Bad for Men: The Truth About Soy Products and Testosterone; 4 4.Neither soy nor isoflavone intake affects male reproductive hormones; 5 5.What Men Should Know About Soy - Herbalife Nutrition A balanced diet containing soy may lower cholesterol, improve blood sugar and blood pressure, protect your heart from disease, and may prevent some men from developing prostate cancer. However, animal meat plays a critical role in all human civilizations, and making the jump to a soy-based diet many not be optimal for human health. Consumption of high-quality proteins like meat and whey in favour of lower-quality proteins like soy can lead to a reduction of muscle mass or even atrophy. Isoflavones have been linked to a lower risk of colon/colorectal cancer, digestive tract cancer and may protect against cancer of the large intestine, stomach, and lungs, which is the second most common cancer occurring in men worldwide. Another study performed in 2007 found that soy protein was comparable to other protein sources, like whey and casein, for helping men recover following an intense resistance training session [18]. More answers below Biglee Murali Hone-affiliated medical practices are independently owned and operated by licensed physicians who provide services using the Hone telehealth platform. ; Soy proteins have many nutritional benefits to the body. Because it's a relatively inexpensive form of protein, soy is used in many processed foods. In general, soybeans are a high protein, low carb food, beneficial for those suffering from hypertension [15]. Isoflavones have just a tiny fraction of the strength of estrogen, says Nagra. Isoflavone pharmacokinetics and metabolism after consumption of a standardized soy and soy-almond bread in men with asymptomatic prostate cancer. Medical doctors and health professionals have found that plant proteins like soy help improve multiple chronic conditions. Soy protein powder, as well as processed products like some meat substitutes and protein bars also include soy protein isolates, a dietary protein thats been isolated from soybeans. Soy can also help you build muscle. , S. Karger AG, 2017, www.ncbi.nlm.nih.gov/pmc/articles/PMC5475232/. Soy is actually a complete protein source. Biochemical Journal, 296(1), 151-154. Applegate CC;Rowles JL;Ranard KM;Jeon S;Erdman JW; Soy Consumption and the Risk of Prostate Cancer: An Updated Systematic Review and Meta-Analysis.. , U.S. National Library of Medicine, pubmed.ncbi.nlm.nih.gov/14628433/. People have many different opinions about soy. There are numerous scientific studies proving that neither soy foods nor soy protein affect hormones in men in any way. There are those who think soy is one of the best protein sources you can use, and others who say that it is terrible for your health especially your testosterone levels. Why is soy bad? Soy is generally a good source of protein . Consuming soy protein provides that added boost of iron needed. Large meta-analyses (4) found that soy did not affect sperm or semen in men. Today over half of the worlds soy is grown in the United States. Soy milk side effects in males have a lot. , and estrogen-mimicking effects. It also contains less saturated fats than meats like beef and pork, which are essential to look out for while managing your cholesterol. Soy protein isolate packs the most protein per serving, which makes sense because it's processed to be a concentrated source of this nutrient. However, the subjects involved consumed an extraordinarily high and unrealistic amount of soy on a nutrient-deficient dietabout nine times the amount consumed by most older men, The Food and Drug Administration recommends eating, for a balanced diet, equal to 2-4 servings per day, . Male hormones Low libido and muscle mass, mood changes, reduced energy levels, and poor bone health are all associated with low testosterone levels.The notion that the phytoestrogens in soy disrupt testosterone production and reduce its efficacy in the body might seem plausible on the surface. Is soy bad for women's hormones? I'm 6'5", 240lbs. The soy intake by using isoflavone supplements would be abnormally high for anyone. The effects of soy and whey protein supplementation on acute hormonal responses to resistance exercise in men. Speaking to reporters at the White House Thursday afternoon, Press Secretary Karine Jean-Pierre attempted to explain why WNBA player Brittney Griner was released from Russian . The science is clear: Soy is safe (and btw, it doesn't cause man boobs), Common Conditions That Mess With Your Hormones. Consuming 25 grams a day of soy (about an ounce) has been found, in some studies, to decrease total and bad LDL cholesterol, making it a heart-healthy food, according to a meta-analysis published in the Journal of the American Heart Association in 2019 (7). Most recent studies show that soy does not negatively impact mens reproductive hormones, such as their testosterone production [duplicate]. Gotoh, N., Graham, A., Nikl, E., & Darley-Usmar, V. M. (1993). InBioenvironmental Issues Affecting Mens Reproductive and Sexual Health, 175-189, Lesinski, G. B., Reville, P. K., Mace, T. A., Young, G. S., Ahn-Jarvis, J., Thomas-Ahner, J., & Schwartz, S. J. Summary. Soy does not have a hidden dark side and is not a dangerous food for men. Sucralose side effects: All You Need To Know. Isoflavone is a phytoestrogen compound found in soybeans with estrogen-like effects, but these effects are much weaker than estrogen found naturally in the body. , MDPI, 24 Mar. A study by Martinez and Lewi, however, reported a 60-year-old man who drank 6 quarts of soy . A later study tested the effects of soy on 20 men for 83 days, and two of those men reported female-like changes in their bodies once the experiment concluded [10]. Farmers first started growing soy in the 11th century. They believe soy isoflavone may reduce the level of testosterone thus lowering sexual function in men. AP Photo/Susan Walsh. Other studies show that soy has virtually no impact on mens risk for prostate caner [13]. No. Soyfoods contain different amounts of isoflavones, and may vary with the brand, but in general, one serving of soy (8-oz soymilk, 3.5-oz tofu, 1-oz soy nuts) offers around 25 mg of isoflavones. Rumors persist that soy can negatively impact men's health. Lets take a quick review of the research. Therefore, at this time it appears safe for men to consume normal quantities of soy protein and soy products (1-2 servings daily if desired as part of a meal). He J;Gu D;Wu X;Chen J;Duan X;Chen J;Whelton PK; Effect of Soybean Protein on Blood Pressure: A Randomized, Controlled Trial.. Ahn-Jarvis, J., Clinton, S. K., Grainger, E. M., Riedl, K., Schwartz, S. J., Lee, M. L. T., & Vodovotz, Y. In humans, soy consumption may contribute to leaky gut syndrome, which can cause inflammation and problems with digestion like excess gas and bloating. Journal of the American Dietetic Association, 94(7), 739-743, Elbardisi, H., Majzoub, A., Al Said, S., Al Rumaihi, K., El Ansari, W., Alattar, A., & Arafa, M. (2018). If your goal is to maximize your testosterone levels and your physical performance, then there are probably better foods that you can eat. Theres no indication that tossing tofu on your stir-fry or sharing a bowl of edamame will negatively affect your hormones. Chen, Li-Ru, et al. Furthermore, the rats and mice involved in these studies consumed a diet primarily consisting of only soy in extremely high amounts. No. Why? Eating tofu or drinking shakes made with soy protein isolate will not cause your body to produce more estrogen (or testosterone). but in lower amounts, which is why many wonder if soy milk is bad for people AMAB, per the Mayo Clinic. Is soy lecithin bad for males? Several recent literature reviews found that soy did not have a significant impact on mens reproductive hormones. Estrogen, erroneously connotated as a female-exclusive hormone, plays an important role is the male bodys hormone equilibrium (Thrane, Paulsen, Orcutt and Krieger 2016). Our focus is to exclusively link to peer-reviewed studies found on respected websites, like PubMed. 10. Testosterone.org 2022. Yes, Testosterone Injections Actually Build Muscle. Rizzo, Gianluca, and Luciana Baroni. Isolated soy protein supplements like pills and powders are not as healthy as soy foods and should not be taken for an extended period. Any medical information published on this website is not intended as a substitute for informed medical advice and you should not take any action before consulting with a healthcare professional. Whey protein is another example of an iron-rich substitute but should be avoided if youre lactose intolerant. Soy is a protein that is found in soybeans, a type of legume that is native to East Asia. Manufacturers are routinely hiding soy in foods such as bread, meat products with filler (hamburgers) protein bars (Cliff bars), infant formula and other common foods. Additionally, why is soy bad for men? Erectile dysfunction results from a number of factors, including low testosterone, which soy does not affect. It's a myth that soy increases estrogen in males. Danger Soy is also a protein powerhouse, an essential component of sports nutrition, and a necessity for vegetarians everywhere. The bottom line is soy is probably ok for men. But, he stresses, They do not function in the same way as estrogen as they are 100-1000 times weaker than our own estrogens.. There are foods that kill testosterone and likewise, foods that increase testosterone, but soybeans and soy food products are not one of them. Soy and soy isoflavones in prostate cancer: a systematic review and metaanalysis of randomized controlled trials. Many have wondered if soy milk is bad for men, but research shows that most people assigned male at birth, as well as babies and children, are safe to eat soy. As for the one study that found two men having feminizing of the chest? I don't know. The Edge is Hone Healths editorial operation. Research clearly suggests that soy is a healthy foodand concerns can be put to rest. Here, experts get down to the bottom of the controversy, explaining the pros and cons of soy and how it can fit into a balanced diet. Soy is a healthy addition to any diet and includes a slew of nutrients, vitamins, and minerals that you need to maintain a healthy lifestyle. Tofu might be bad for you, because it is refined food. May reduce menopause symptoms Since soy acts as a natural estrogen, it may help reduce these symptoms. Though evidence supporting soy lecithin as a supplement is . No. Soy is one of the most controversial foods in the world. Cancer Prevention Research, canprevres-0465. So far it looks like soy is inferior to other protein powders, such as whey or casein. Meanwhile, another study from 2011 examined the effects of soya on one 19-year-old man who consumed large quantities of soya as part of a vegan diet. You must consult your own medical professional. Absolutely not! Kimberly Langdon 318 5th St, West Des Moines, IA,5026. Overall, soy is probably an ok food for men. Nachvak SM;Moradi S;Anjom-Shoae J;Rahmani J;Nasiri M;Maleki V;Sadeghi O; Soy, Soy Isoflavones, and Protein Intake in Relation to Mortality from All Causes, Cancers, and Cardiovascular Diseases: A Systematic Review AND Dose-Response Meta-Analysis of Prospective Cohort Studies., Journal of the Academy of Nutrition and Dietetics. Prostate cancer is the most common cancer in men in the U.S., except for skin cancers, according to the American Cancer Society. Soy, the man killer Gyno from too much soy protein Male breasts from hormone imbalance Soy lecithin is a generally safe food additive. It's in the blood. Along with the isoflavones, soy is rich in amino acids like Arginine, which helps to regulate blood flow, blood pressure levels, and may help manage heart disease [16]. Please consult your physician prior to consuming any over-the-counter supplements, like a natural testosterone booster, and/or getting a prescription for a pharmaceutical medication. Bahadoran, Zahra, et al. I Lost 120 Poundsand 20 Percent Body FatWith TRT, This Link Between Thryoid Issues and Low T May Blow Your Mind, Before TRT, I Watched My 10 Rep Squat Minimum Tank to 2. But like other studies found on soys effects and benefits, more testing must be done to confirm these results. But there are other ways that men can increase testosterone naturally without worrying about increasing estrogen. It may fight diabetes. Well, we have the science-backed evidence that gives the true answer on whether the effects of soy consumption are good or bad for mens health. Soy Isoflavones and Cancer Prevention.. Including the recommended amount of soy is a great way to increase your plant protein, especially for people who follow a vegetarian diet, vegans, or anyone with underlying health concerns. Hone is an online clinic that helps people optimize their hormones. , U.S. National Library of Medicine, pubmed.ncbi.nlm.nih.gov/18555850/. This can have so-called "feminizing effects" which cause guys to lose their appetite for sex ( 3 ). Jargin, Sergei V. Soy and Phytoestrogens: Possible Side Effects.. One cup has 131 calories, 8g protein, 4.3g fat, and 10g of sugar. As men grow older, their levels of testosterone drop but estrogen levels increase. Fermented soy is arguably the healthier form of soy. Any statements made on this website have not been evaluated by the FDA and any information or products discussed are not intended to diagnose, cure, treat or prevent any disease or illness. Long-Term Effects of Phytoestrogen Daidzein on Penile Cavernosal Structures in Adult Rats. The subjects testosterone levels decreased 19% during their use of soy protein powder and induced estrogen activity. No. , U.S. National Library of Medicine, pubmed.ncbi.nlm.nih.gov/31278047/. Taku K;Umegaki K;Sato Y;Taki Y;Endoh K;Watanabe S; Soy Isoflavones Lower Serum Total and LDL Cholesterol in Humans: A Meta-Analysis of 11 Randomized Controlled Trials., The American Journal of Clinical Nutrition. A half-cup of raw tofu has 94 calories,10g protein, 6g of fat, and 434 mg of calcium. Soy protein: Impacts, production, and applications. The few clinical studies that show soy having a negative effect on hormones were performed on animals, mainly mice and rats. Several recent studies show that soy is a heart-healthy food, and decreases your risk for cardiovascular disease [4, 5, 6]. But that didnt stop some from jumping to the conclusion that if soy intake has a negative impact on lab rats, they surely have similar effects on humans. However, it should probably be avoided for men looking to optimize their testosterone levels. (2008). The only studies that show a negative outcome were done on people and animals who were consuming almost all of their calories from soy. People think soy is bad for men because of its high isoflavone content- a type of phytoestrogen (plant estrogen). A little bit of soy sauce here or there is probably fine. , MDPI, 24 Nov. 2016, www.ncbi.nlm.nih.gov/pmc/articles/PMC5188409/. Soy sauce has been called mans oldest prepared seasoning [19]. Tofu is made from soy bean. Administrators gave these men 18-36 servings of soy each day and in supplement form, not food. The internet would have men thinking soy is the devil. For example, people following a vegetarian or vegan diet have a high risk of developing anemia mainly because most iron in a traditional diet comes from animal protein. Why soy is bad for males? A later study tested the effects of soy on 20 men for 83 days, and two of those men reported female-like changes in their bodies once the experiment concluded [10] . It can also cause some men to have emotional mood swings reminiscent of a hormonal woman, although this effect has little scientific evidence to back it up. , U.S. National Library of Medicine, pubmed.ncbi.nlm.nih.gov/18558591. There have been dozens of randomized controlled trials and meta-analyses showing that consuming soy or soy phytoestrogens does not have a clinically relevant impact on testosterone levels, says Nagra. Journal of the American College of Nutrition,32(1), 66-74, Lao, M., Harnisch, B. , The Korean Nutrition Society and the Korean Society of Community Nutrition, Dec. 2014, www.ncbi.nlm.nih.gov/pmc/articles/PMC4252520/. Thats at least 10 times more than people eat on average, even in cultures that consume a lot of soy. However, Fortunately, the effects of plant estrogens on mens health are very positive. This information, including any referenced scientific or clinical research, is made available for educational purposes only. AJ;, Michelfelder. . A., & Honig, S. C. (2018). Your access to Testosterone.org is subject to our full disclaimer and terms of use. Soy proteins do not increase or reduce testosterone levels in men and women. Short men can't reach high things, tend to be less strong, and in general don't project strength which is an attractive feature for men. For more information about the relationship between Hone and the medical practices click here. Geographical differences in semen characteristics of 13 892 infertile. Soy and Health Update: Evaluation of the Clinical and Epidemiologic Literature.. world of medical research. Wilson calls it an "urban legend," adding that if the two compounds were the same "there would be a lot of men in need of bras!". In another, a 60-year-old man who came to the doctor for breast growth reported drinking almost 100 ounces of soy milk per day (3). , MDPI, 5 Jan. 2018, www.ncbi.nlm.nih.gov/pmc/articles/PMC5793271/. In this article, we detail what soy is, explain the effects of this protein-packed legume on testosterone, and finally break down the one ingredient that started this false rumor in the first place. Disclaimer: The contents of Testosterone.org are for informational and educational purposes. Male fertility is not affected by soy Some experts suggest avoiding soy for men's sexual health due to the presence of phytoestrogen. There are also several studies showing that soy decreases your overall all-cause mortality risk, and may even reduce your risk for cardiovascular disease and certain cancers. This same effect may also block the overproduction of estrogen, lowering your risk of certain cancers, but scientists must perform further research in this area [8]. Red wine and green tea are two drinks that have a better track record for raising testosterone in men. , German Medical Science GMS Publishing House, 15 Dec. 2014, www.ncbi.nlm.nih.gov/pmc/articles/PMC4270274/. Isoflavone Supplements for MENOPAUSAL Women: A Systematic Review.. The daily iron intake in soy is also significant for those with minor iron deficiencies. But there are other ways that men can, Soy was initially shown to negatively affect male rats and mice, including lowering testosterone, decreasing sperm count, and affecting litter size, First of all, rats and mice are not humans and therefore process food differently. However, research is not considered conclusive. As a protein source, soy has a slower protein synthesis than whey, casein and pea proteins and contain anti-nutrients like lectin and protein inhibitors that block the digestion and absorption of nutrients. It would be best if you watched out for highly processed foods containing soy, such as soy protein bars, soy powders, and soy meat substitutes. Toss in some fears that environmental estrogens contributed to mens declining sperm count and soy was officially protein non grata. Why soy is bad for males? Neither soy nor isoflavone intake affects male reproductive hormones: An expanded and updated meta-analysis of clinical studies. At that point, theres potential that youll miss out on other nutrients that you need in your diet, says Nagra. The isoflavone in soy may reduce inflammation of blood vessels which is beneficial to cardiovascular health [13]. Not only is soy hormone-friendly, but it also provides a good source of heart-healthy unsaturated fat and fiber, as well as iron, calcium, zinc, and B vitamins, research points out (6). , an essential component of sports nutrition, and a necessity for vegetarians everywhere. Likewise, we do not provide medical advice, diagnosis, or treatment. However, elevated levels of estrogen stunts muscle development, lowers testosterone, increases cortisol levels, causes gynecomastia, decreases libido, and even reduces sperm production. Soybeans are not bad for men, but because of the estrogen-like ingredient isoflavones and the negative effect that high estrogen has on men, some jumped to the conclusion that soybean products are harmful, which is simply not true. However, soy has a bad reputation among men as many think soy foods can drastically reduce testosterone levels, make their appearance feminine, lead to poor libido, and hinder muscle growth. Farr Institutedoes not provide medical advice, diagnosis, or treatment. This is especially true as soy has a reputation for lowering testosterone levels and raising estrogen levels in men. Antioxidant Action of Soy Isoflavones on Oxidative Stress and Antioxidant Enzyme Activities in Exercised Rats.. It's no different than V's and curves. His testosterone levels also dropped drastically. Soy, it turned out, contains estrogen-like compounds called isoflavones. Overall, the research is pretty clear that soy is an ok food to eat, and it will not increase your risk for heart disease, cancer or other diseases. , U.S. National Library of Medicine, pubmed.ncbi.nlm.nih.gov/15998749/. , U.S. National Library of Medicine, pubmed.ncbi.nlm.nih.gov/19524224/. No. However, most modern-day soy products are heavily processed, and contain large amounts of phyto-estrogens which have been shown to increase estrogenic effects in men. This compound can bind to estrogen receptors and mimic estrogen properties found in the human body. Natural soy products like tofu or edamame could replace red meat and other animal sources of protein higher in saturated fat," says dietitian Kathy McManus, director of the Department of Nutrition at Harvard-affiliated Brigham and Women's Hospital. No Difference Between the Effects of Supplementing With Soy Protein Versus Animal Protein on Gains in Muscle Mass and Strength in Response to Resistance Exercise. For example, in Japan, older adults consume 30 to 50 mg per day of isoflavones, while in the U.S., its only a few milligrams per day, shows research (1). Please consult a healthcare practitioner before making changes to your diet or taking supplements that may interfere with medications. Environmental Issues in Maintaining Reproductive Health. Cancer Prevention Research, 1-29, Moundras, C., Remesy, C., Levrat, M. A., & Demigne, C. (1995). In a review of 30 studies, high soy consumption was linked to a significantly lower risk of developing the disease ( 25 ). After you eat soy, the isoflavones are metabolized and then may weakly have effects like estrogen in your body, according to the Centers for Disease Control and Prevention. However, soy has a bad reputation among men as many think soy foods can drastically reduce testosterone levels, make their appearance feminine, lead to poor libido, and hinder muscle growth. Dwyer, J. T., Goldin, B. R., Saul, N., Gualtieri, L., Barakat, S., & Adlercreutz, H. (1994). , Oxford University Press, 1 Sept. 2010, academic.oup.com/biolreprod/article/83/3/488/2530146. However, soy milk is probably an ok choice for most people. Heres a breakdown of common soy food products to give you an idea of their nutritional value: There are several types of soybean products described as either fermented and unfermented. Not all protein sources are equal and some forms of protein are better than others. High soy consumption does not affect the sperm count or have any effects on testosterone levels. Soybeans contain a high concentration of a compound called isoflavones, a type of plant estrogen also known as phytoestrogen. Soy has played a role as a dietary staple in Asia and dates back many centuries. However, there are probably other foods that you should focus on if your goal is to raise your bodys natural testosterone production. However, the impact of isoflavone is much weaker and does not affect estrogen levels [4]. Why soy is bad for males? blurred vision. Consume up to four servings a day of soy. Soy isoflavone may reduce LDL, the bad cholesterol by 3% 6%, which doesnt sound like much, but every little bit helps when it comes to improving your lifestyle [14]. Testosterone.org follows the strictest sourcing guidelines in the health and hormone replacement industry. Soy is eaten in very small quantities before a meal by the Japanese to aid in digestion. Fortunately, the effects of plant estrogens on mens health are very positive. Healthy Focus is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to healthyfocus.org. Soy bean is almost complete protein, but it lacks a few essential amino acids (essential amino acids can't be made in the body and must come from food). However, the subjects involved consumed an extraordinarily high and unrealistic amount of soy on a nutrient-deficient dietabout nine times the amount consumed by most older men [1]. In addition to hormonal effects, serious long-term health conditions and illnesses can be attributed to high soy consumption. This compound can bind to estrogen receptors and mimic estrogen properties found in the human body. Why soy is bad for males? It may be better to consume whole sources of soy like edamame, rather than soy ultra-processed foods since these can be high in sodium. Some people think that eating soy is terrible for your health and will crush your bodies natural testosterone production. Why is tofu bad for you? Indeed, one recent study found that people who eat soy had lower total cholesterol, LDL cholesterol, and triglycerides [7]. About Us · Contact Us · Disclaimer · Privacy and Cookie Policy. Today, my uncle gifted my sister, 11 year old, a brand new phone. Numerous studies show that people who consume soy products have a lower all-cause mortality risk, and are less likely to have heart disease, type 2 diabetes or even cancer. >>Boost your testosterone with TestoPrime. Soy protein does not cause men to grow excess breast tissue or change the body in any way that looks more feminine. 25 . Many soy products are genetically modified organisms (GMOs)Can effects digestion. But there was one study conducted on humans that resulted in hormonal disturbances. Methionine deficiency in rats fed soy protein induces hypercholesterolemia and potentiates lipoprotein susceptibility to peroxidation. Soy does not turn men into women, cause infertility, prostate cancer, man-boobs, or affect reproductive hormones. In fact, most studies show that soy consumed in moderation has beneficial effects on mens health as well as women and children, proving theres no reason for most people to avoid soy. Y;, Sarkar FH;Li. Incorporating a diet with soy isoflavones may reduce the levels of bad cholesterol and lower blood pressure [6]. Men in Asian countries, especially Japanese men, consume the most soybeans globally, and some eat anywhere between 60-120 grams of soy per day without any adverse side effects [3]. , but because of the estrogen-like ingredient isoflavones and the negative effect that high estrogen has on men, some jumped to the conclusion that soybean products are harmful, which is simply not true. Soy does not negatively affect testosterone in men. Why soy is bad for males? Another meta-analysis found that soy milk had a protective effect against prostate cancer [15]. Arab Journal of Urology,16(1), 3-9, Hajos, G., Gelencsr, E., Grant, G., Bardocz, S., Sakhri, M., Duguid, T. J., Newman, A.M.,Pusztai, A. Huang H;Krishnan HB;Pham Q;Yu LL;Wang TT; Soy and GUT Microbiota: Interaction and Implication for Human Health., Journal of Agricultural and Food Chemistry. In those reports, animals and people who were fed stupid amounts of soy developed issues like gynecomastia (man boobs) and erectile dysfunction (1). (2015), soy protein alters the physiological responsesin men and disrupts estrogen levels. The puny estrogen mimics simply arent strong enough to meaningfully affect your hormones as long as youre eating them in normal amountswhich can include multiple servings each day, he explains. We may receive commissions on purchases made through links on our site. But before you toss out your tofu, lets take a deeper look into these studies. Why soy is bad for males? Now that you know the truth about soy, we found and answered the most common questions men are asking about the possible effects of soybean products on their health. Made with testosterone. There are just so many foods, including animal proteins, vegetables and fruits that are better for your overall health and for your total testosterone levels. There is no data to suggest that soy, when consumed in normal (aka not excessive amounts) will cause excess breast tissue to grow (10). JE;, Martinez J;Lewi. Effects on thyroid function. As part of your subscription and as medically indicated, physicians prescribe medications, and recommend supplements that are delivered to you from the comfort of your home. , BioMed Central, 15 Mar. There are many health benefits of soybeans and soy protein when included in a balanced diet. According to Ahn-Jarvis et al. Soy has been marketed as asuperfood but there is controversy over this product. Eat Better Get Fit Potential Downfalls of Soy and Soy Products, Soy, in general, is a healthy food product when consumed in its most natural form, but when soy is over-processed into food such as soy protein bars, soy-infused veggie sausages, and soy burgers, thats when these products are more questionable and can lead to digestive issues such as nausea, constipation, and bloating. In general, soybeans are a high protein, low carb food, beneficial for those suffering from hypertension, Not only do soybeans initiate the lowering of blood glucose levels, but, It was once thought that including soy protein in your daily diet increased your cancer risk, but over time and with more research, the opposite is true. There are numerous scientific studies proving that neither soy foods nor soy protein affect hormones in men in any way. Beware of sports products and snack bars, as many of them contain soy to boost protein content, and it is easy to get too much; limit intake to one per day, if any. Tossing a hunk of tofu on the grill doesnt have the same panache as a rib-eye, but thats not the reason most men looking for a protein fix steer clear of soy. Hogervorst, E. (2014). The truth is soy has very little impact on mens sexual health, or their testosterone production. But what does the research say about it? Soy is one of the only plant foods that contains all 11 essential amino acids. Important Disclaimer: The information contained on Healthy Focus is intended for informational and educational purposes only. Cumulative Meta-Analysis of the Soy Effect Over Time. Soy milk is probably not the best drink in the world if your goal is to raise testosterone levels. Soy was initially shown to negatively affect male rats and mice, including lowering testosterone, decreasing sperm count, and affecting litter size [9]. Always consult your healthcare provider with any questions. It would be very difficult for humans to consume the same amount of soy in relation to what scientists provided for the animals in these experiments. Others think that soy is a heart-healthy food that deserves a place in your overall diet. Only 10%-15% of fat from soy is saturated fat, lowering your risk of heart disease. However, it wasnt introduced to Europe and North and South America until the 1700s. There is also little evidence to suggest that soy negatively impacts mens reproductive systems. Estrogen is a female Hormone. During processing, microorganisms are added to break down the nutrients in the soy, increasing the protein levels and making it easier to digest. The soy myth has been around since the 1950s when animal studies on soy first began but has subsequently been debunked multiple times since. Soybean isoflavone exposure does not have feminizing effects on men: a critical examination of the clinical evidence. It was once thought that including soy protein in your daily diet increased your cancer risk, but over time and with more research, the opposite is true. Soy may not be ideal for men looking to optimize their hormones and life, but its not the worst thing men can put in their bodies. Soybean products can be either fermented or unfermented. While there are worries that soy may affect testosterone, research has found that soy consumption did not decrease reproductive hormone levels (4). , U.S. National Library of Medicine, pubmed.ncbi.nlm.nih.gov/19145965/. Fortunately, soy is one of the most researched foods in the world, so we have plenty of data to draw our conclusions from. Soys bad publicity stemmed from two case studies that suggested excessive amounts of the protein from soybeans appeared to impact hormones. Testing has shown that eating soy protein and foods containing soy isoflavones does not increase estrogen levels or decrease testosterone levels in men. The receipts: A 2022 review of 417 observational studies, clinical studies, and systematic reviews and meta-analyses in Critical Reviews in Food Science and Nutrition concluded that isoflavone intake did not impact levels of testosterone, estrogen, sperm, or semen in men (1). Testing has shown that eating soy protein and foods containing soy isoflavones does not increase estrogen levels or decrease testosterone levels in men. This includes thyroid irregularity, bladder cancer, prostate cancer and dementia, particularly those over 65. Two studies tested this theory (Habito et al, 2000 and Mitchell et al, 2001) and found that soy intake did not have a significant effect on estrogen levels in men. Metabolism, 44(9), 1146-1152, Neacsu, M., Fyfe, C., Horgan, G., & Johnstone, A. M. (2014). Zampelas, Antonis. If you have concerns about your hormone levels and want to know which foods to avoid that could lower testosterone, we have information on alcohol and testosterone or you can check out what we found out about flaxseed and testosterone. Experiment with different soy foods and their preparations to see what you like. Short women are perceived as more petite and feminine, which is an attractive trait for women. Problems arise when soy (or other foods) becomes the dominant food in your diet. The myth that men develop breasts from soy sprang from thinking phytoestrogen and human estrogen are synonymous. All Right Reserved. The Food and Drug Administration recommends eating 25 grams of soy a day for a balanced diet, equal to 2-4 servings per day [2]. However, if you are trying to maximize your bodies natural testosterone production, then you should probably keep soy out of your diet. Soy lecithin is a generally safe food additive. 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