If lean, active guys follow a keto diet with very few calories for a long time, it might lower key hormones that affect energy and sex drive — even if they're otherwise healthy.

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Evidence from Studies

Supporting (1)

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THE IMPACT OF KETOGENIC DIET ON MALE REPRODUCTIVE HORMONES: A COMPREHENSIVE REVIEW

Narrative Review

Human

The study finds that while keto diets can help some men, they may lower key hormones in lean, active men if followed for a long time with too few calories.

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No contradicting evidence found

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Source Study

THE IMPACT OF KETOGENIC DIET ON MALE REPRODUCTIVE HORMONES: A COMPREHENSIVE REVIEW

Score: 1

DOI: 10.37557/4wczev27

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Keto diets might boost testosterone in overweight or insulin-resistant guys, but could lower hormone levels in lean guys who aren't eating enough calories.

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If overweight or obese guys who have trouble using insulin stick to a keto diet for a short time, their testosterone levels might go up — probably because they lose weight, get better at handling sugar, and have less inflammation.

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