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Avoid Prolonged Severe Caloric Deficit in Lean Men
If a male is 15% body fat or less, avoid sustained calorie restriction below maintenance across most days for multiple weeks because it likely reduces testosterone and free testosterone and may impair fertility; probably no more than a 500-calorie daily deficit for extended periods if trying to conceive or maintain fertility.
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“Men who are in a healthier range of body fat percentage would be wise to not go into at least a severe caloric deficit okay probably no more than 500 calories per day caloric deficit for extended periods of time if you're thinking about conceiving or you want to maintain fertility”
Andrew Huberman · Your Top Health Questions Answered · Jul 27, 2026 · 57:13 · YouTube ↗
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