Nutrition & Diet
Intermittent Fasting for Men: Benefits, Risks, and Protocol
16/8, OMAD, and 5:2 — what the evidence supports and what backfires.
8 min read · XT Editorial Team · Reviewed & updated
What IF does well
16/8 fasting is well-tolerated, supports modest fat loss, improves insulin sensitivity, and elevates growth hormone briefly. Adherence is its biggest virtue.
Where it backfires
Aggressive fasting (OMAD, alternate-day) in lean training men can suppress testosterone via under-eating. Match calorie intake to training needs.
The practical protocol
12-14 hour overnight fasts most days, 16/8 a few days per week, protein-anchored first meal.
Frequently asked questions
- Does fasting lower testosterone?
- Short fasts (under 24 hours): neutral. Repeated long fasts or chronic under-eating: yes.
- Should women fast the same way?
- No — hormonal effects differ. Out of scope here.
Related reviews, comparisons & tools
Comparisons
Ready to take action?
Compare our editor-rated testosterone-support formulas or take the 2-minute quiz to find what fits your goals.