Soy for Men: The Good, the Bad, and the Ugly (2024)

We’re currently celebrating Men’s Health Week from June 14 to 20. It’s an important initiative that shines the spotlight on men’s health issues and encourages men to take charge of their health and well-being. It’s clear that men face different health issues than women, and we also have different needs.

Soy foods continue to polarize opinions. They are subject to numerous wild claims, many of which are unsubstantiated. So let’s settle this age-old debate once and for all, because soy foods are pretty super in all their glorious and delicious forms—especially for men.

Soybeans are members of the legume family—their cousins include lentils, peas, and peanuts. Nutritionally speaking, soybeans are nutritional powerhouses. They are a rich source of high-quality protein and fiber, and they are low in total and saturated fat and cholesterol. Several micronutrients are also present in soybeans, including magnesium, potassium, and folate, which is essential for DNA repair.

Soybeans are a source of hormone-like substances called isoflavones, a type of phytoestrogen that mimics the action of estrogen. This feature is why they sometimes (unfairly) get a bad rap.

Soy foods are a staple in Asian diets, and vegans and vegetarians are encouraged to include soy foods in their diets. But omnivores should also embrace a range of soy foods, including soy milk, tofu, tempeh, and soybeans (aka edamame) in their diets.

So let’s discuss why men, in particular, should be eating more soy foods, and address some of the common misconceptions associated with soy.

Heart health

Research shows that soy protein can help to reduce LDL cholesterol—the nasty type that can clog your arteries. Several studies have shown that consuming25 grams of soy protein a day for six weeks helps to lower LDL cholesterol by 3 to 4 percent.

The exact mechanism for this effect is still unknown. However, it’s hypothesized that there is a synergistic effect between soy protein and the isoflavones present in soy foods. Soy isoflavones have been shown to have a strong antioxidant effect. What’s more, scientists have also revealed that they can improve the elasticity of blood vessels and reduce inflammation. Moove over cow’s milk; soy milk may be a nifty present for your heart.

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. However, this theory has been debunked and refuted bythis meta-analysis(a large study of all the studies in this area). There is, in fact, no robust evidence that soy causes elevated estrogen levels in males or indeed, has any significant effect on hormone levels.

Muscle mass

Soy foods are a great source of plant protein. Men continue to rely heavily on animal foods to meet their protein requirements, but being more plant-focused has definite advantages. Reducing our meat intake can reduce our disease risk profile without impacting our protein intake. Including a serving of tofu and tempeh in place of meatwill not jeopardize your gym gains.

Prostate cancer

Prostate cancer is the second most common cancer in men. It accounts for 15 percent of all cancers in men worldwide. The incidence ofprostate cancer is lower in Asian populationswhere soy foods are widely and regularly consumed. An extensive analysis of the research in this area concluded that there is a significant association between soy consumption and lower prostate cancer risk.

So don’t listen to the naysayers who say that soy is not a good food for you. The evidence well and truly indicates that soy foods are ‘soy’ good for us. You can confidently add tofu or tempeh to a stir fry, include soy milk in your morning latte, and garnish your salad with edamame beans. Your insides will thank you for it.

Soy for Men: The Good, the Bad, and the Ugly (2024)

FAQs

Should I avoid soy as a male? ›

Claim: Soy lowers testosterone levels.

Just one year later, more tests showed neither soyfoods nor isoflavone supplements affect levels of bioavailable testosterone concentrations in men. In 2021, an update not only corroborated that finding, but revealed the two have no effect on male estrogen levels either.

What does soy do to the male body? ›

Soy isoflavones have been shown to have a strong antioxidant effect. What's more, scientists have also revealed that they can improve the elasticity of blood vessels and reduce inflammation. Moove over cow's milk; soy milk may be a nifty present for your heart.

Does soy raise estrogen in males? ›

Does Consuming Soy Raise Estrogen and/or Lower Testosterone in Men? The simple answer is “no,” but there are two case reports in which two older men saw hormonal changes after consuming an extreme amount of soy.

What does soy do to testosterone? ›

However, more recent human studies have found that soy foods had no effect on testosterone levels in men ( 28 , 29 , 30 , 31 ). While more research is needed to confirm, the belief that soy products affect testosterone appears to have been debunked.

Is soy bad for men prostate? ›

There was no link between eating the soy compounds and prostate cancer in general or non-aggressive prostate cancer, though—only to prostate cancer that was detected at a later stage, or the kind that is more likely to spread quickly.

Why shouldn't you eat soy? ›

However, some worry about soy's potential downsides, including its GMO content, possible estrogen-like effects, and long-term influence on growth, digestion, sexual maturation, thyroid health, and breast cancer risk. Currently, few of these concerns are backed by strong science. However, more research is needed.

What does soy do to sperm? ›

In the case of sperm, several studies concluded that excessive soy intake might decrease sperm concentration. Honestly, these are probably the scariest on the list because they are not foods, but they still end up in what we eat.

Does soy feminize the body? ›

None of the studies showed that consuming soy had any effects on reproductive hormones or sem*n quality, both objectively measured changes that you might expect to see before any overt “feminization” would occur. The intervening years have produced even more evidence that soy has no feminizing effect on men and boys.

What are the side effects of eating too much soy? ›

The most common side effects of soy are digestive upsets, such as constipation and diarrhea. Soy may alter thyroid function in people who are deficient in iodine. Current evidence indicates that it's safe for women who have had breast cancer or who are at risk for breast cancer to eat soy foods.

What happens if a male has too much soy? ›

Soy contains isoflavones, which are converted in the body to phytoestrogens, similar to human estrogen that occurs naturally in both men and women. Theoretically, a high isoflavone intake could stimulate production of estrogen and decrease production of testosterone, with one result being enlarged breast tissue.

How to boost testosterone in older males? ›

  1. IMPROVING LOW TESTOSTERONE NATURALLY. The following information is a summary of materials featured in the “Men's Health” Whole Health overview. ...
  2. MAINTAIN IDEAL BODY WEIGHT. ...
  3. AVOID DEVELOPING DIABETES. ...
  4. EXERCISE. ...
  5. SLEEP WELL. ...
  6. AVOID TOBACCO PRODUCTS. ...
  7. AVOID EXCESSIVE ALCOHOL. ...
  8. AVOID OPIOID PAIN MEDICATIONS.

Is soy bad for your gut? ›

However, a high-level intake of soy proteins (above 25.0% weight) can induce genotoxic and cytotoxic damage to the intestine, which can be lowered by adding fermentable fibres to soy-based diets. Fermented soy products, such as tofu, contain microbes such as Streptococcus, Bifidobacteria, and Enterococcus.

Should men avoid soy? ›

Neither soy nor isoflavone intake affects male reproductive hormones: An expanded and updated meta-analysis of clinical studies. Reprod Toxicol. 2021 Mar:100:60-67.

Does coffee increase testosterone? ›

Several studies were conducted on this topic, and many found similar positive conclusions. Caffeine consumption (up to 800mg) was linked with higher testosterone levels of up to 14% if taken before a workout; however, cortisol levels increased as well, with one study citing a 21.3% increase and another at 44%.

Which foods increase testosterone the most? ›

10 Foods That Increase Testosterone
  • Onions and Garlic.
  • Shellfish.
  • Fatty Fish.
  • Leafy Green Vegetables.
  • Cocoa.
  • Avocados.
  • Berries.
  • Egg Yolks.
May 19, 2023

Is soy bad for male fertility? ›

Soybeans are rich in isoflavones, which experiments have shown to have reproductive toxicities. A Harvard Study linked high consumption of isoflavones to lower sperm counts. For many, soy can be a healthy food, but if you are a man struggling with fertility, it may be worth keeping off the list.

Is soy lecithin bad for males? ›

It is a prevalent myth that soy lecithin intake can create a hormonal imbalance in males and females. Soy lecithin is derived from soy oil which contains a meagre amount of estrogen compounds. A tiny amount of phytoestrogen intake through soy lecithin will not create a hormonal imbalance.

What foods raise estrogen in men? ›

Reduce alcohol consumption, as studies show heavy alcohol use can increase estrogen in men. Choose organic, hormone-free meats and dairy foods to minimize estrogen activity. Limit your intake of soy-based foods (tofu, soybeans, tempeh, etc.) and other high-estrogen foods.

Is soy protein bad for men on Reddit? ›

The TL;DR is that consumption of soy in any reasonable quantity does not appear to adversely affect hormones or other related parameters (e.g. sperm counts and quality in men).

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