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Strong Support

When overweight men eat a very low calorie diet for 12 weeks, their testosterone levels go up a lot, which can help improve their health.

31
Pro
0
Against

Evidence from Studies

Supporting (1)

31

Community contributions welcome

31

Caloric Restriction Increases Serum Testosterone Concentrations in Obese Male Subjects by Two Distinct Mechanisms

Cross-Sectional Study
Human
2014 Apr

The study used the exact same diet and group of people as the claim and found that testosterone levels went up a lot, just like the claim said.

Contradicting (0)

0

Community contributions welcome

No contradicting evidence found

Gold Standard Evidence Needed

According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.

Source Study

Caloric Restriction Increases Serum Testosterone Concentrations in Obese Male Subjects by Two Distinct Mechanisms

Score: 31
DOI: 10.1055/s-0033-1358678

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Men who ate mostly organic, low-carb Mediterranean food (lots of veggies, nuts, fish, and no junk food) for 3 months had much higher levels of the male hormone testosterone.

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When overweight men eat fewer calories, their bodies slow down the process that turns testosterone into estrogen. This means they have more testosterone relative to estrogen, showing that fat tissue isn't making as much estrogen as before.

31
0
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When you have very low body fat and eat fewer calories, your body lowers testosterone levels to save energy for staying alive instead of making babies.

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