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Does Soy Lower Testosterone: Separating Facts from Fiction

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Written by- Julian Carter

Testosterone, a hormone crucial for muscle growth, bone density, and sexual health, is naturally present in the body. 

However, its levels can be influenced by various factors, including specific foods like soy.

Soy contains phytoestrogens, which have a similar structure to estrogen (female sex hormone) and can mimic its effects in the body.

Consuming a lot of soy-based products may potentially lower testosterone levels in males due to its estrogen-like effects.

You may wonder, “Does soy lower testosterone?”

This article delves into a comprehensive analysis of the complex relationship between soy and testosterone. 

Does soy lower testosterone

Men who consume soy in moderation are unlikely to see a major decline in testosterone levels.

Excessive soy consumption can lead to low testosterone levels due to its estrogen-like components.

Soy is popularly known for containing isoflavones, which is a type of phytoestrogens.

Phytoestrogens from plants are like estrogen, a hormone that men and women have in common. 

Due to phytoestrogens, soy has the capacity to attach to estrogen receptors in the body.

This binding has the potential to disrupt the body’s natural hormonal balance.

People with low testosterone levels should avoid eating soy.

Low testosterone levels are related to hormonal imbalance that favors estrogen. 

Consuming too much soy with its phytoestrogens may further disrupt the balance between testosterone and estrogen in men.

A 2005 study on 35 men consuming soy protein for 57 days showed reduced testosterone levels.

However, more research is needed to determine that soy lowers testosterone levels in men.

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Foods that lower testosterone

Normal testosterone levels can improve mood, muscle mass, and boost your libido.

Individuals with low testosterone levels should avoid soy-based products, which lower testosterone levels.

Apart from soy, several other foods have the potential to lower testosterone levels.

Flaxseed is rich in lignans, which can increase testosterone levels. Lignans bind to testosterone and break it down in the body.

Drinking excessive alcohol may affect a man sexually with many health risks. 

A 2019 study shows high alcohol consumption can also increase testosterone levels.

Did you know:
Soy sauce is made from soybeans but has a fermentation process that makes it less likely to have any hormonal effects.

How to increase testosterone levels

Testosterone GelSource: HappyNati
Man applying testosterone gel

Testosterone replacement therapy is a popular and widely used treatment for low testosterone

Several treatments for males with low testosterone levels may be available.

According to a Harvard study, several types of testosterone therapy include:

Individuals with specific diseases, such as prostate cancer or  heart failure, may be ineligible for this medication.

Always check your doctor before taking any medication to ensure the least amount of side effects.

Do not attempt to self-medicate. To avoid unwanted effects, always consult a doctor before taking any medication.


The relationship between testosterone and soy is complex.

Soy can have many health benefits, such as addressing obesity and Type-2 Diabetes. 

However, does soy lower testosterone? Or Is soy bad for testosterone? 

Soy has estrogen-like effects on your body, but they usually don’t affect your testosterone levels. 

Phytoestrogens from soy don’t affect your testosterone levels like human estrogen does, and they probably won’t if you take them in moderation.

You can include soy in your diet as it causes no effects on your testosterone levels.

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Frequently Asked Questions

Does soy reduce testosterone levels? 

Research indicates that soy consumption does not significantly reduce testosterone levels in men. 
While soy contains compounds known as phytoestrogens, their impact on male hormone levels is minimal and inconsequential in most cases.

What health benefits are associated with consuming soy products?

Soy is an excellent source of protein, fiber, vitamins, and minerals. 
Consuming soy regularly has been shown to reduce the risk of heart disease, improve bone health, and have anti-inflammatory benefits. 
Consuming a moderate amount of soy can improve your overall health.

What should men do if they have concerns about soy and its impact on their hormone levels?

Men concerned about soy’s impact on their hormone levels should consult a healthcare professional. 
A medical evaluation can provide personalized advice and address specific worries based on individual health and dietary factors.

Does soy increase estrogen levels in men? 

Yes, soy contains phytoestrogens that can elevate estrogen levels in men slightly.
However, it generally doesn’t lead to substantial hormonal imbalances or health issues.
Consult your doctor before including anything new in your diet to avoid side effects. 

Can soy-based products like tofu and soy milk affect testosterone differently?

Soy-based products like tofu and soy milk generally have similar effects on testosterone levels due to their phytoestrogen content. 
Their impact is typically minimal and consistent, with no significant difference in testosterone modulation observed between these products.

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