Does Intermittent Fasting Boost Testosterone?

Yes, intermittent fasting can boost testosterone levels in men, but the effects vary by individual and fasting protocol. Research shows time-restricted eating windows of 16-20 hours can increase testosterone by 180-400% in some studies. The mechanism involves reduced insulin levels and increased growth hormone production during fasted states. Short-term fasting (12-24 hours) typically shows the most benefit, while prolonged caloric restriction may actually decrease testosterone. Men following 16:8 intermittent fasting protocols often see improvements within 4-8 weeks, particularly when combined with resistance training and adequate sleep.