Flux Blog
Science-backed insights on men's hormonal health, performance, and optimization.
What Time Does Testosterone Peak in Men?
Your testosterone peaks between 5:30 and 8:00 AM, then drops up to 43% by evening. Learn exactly how your 24-hour hormonal rhythm works and how to use it.
Do Men Have Hormonal Cycles Like Women?
Yes — but they work differently. Men have a 24-hour testosterone cycle, and emerging research suggests longer 20-30 day rhythms. Here's what the science actually says.
How Sleep Affects Testosterone: The Science
One week of 5-hour nights drops your testosterone by 10-15% — equivalent to aging 10-15 years. Here's exactly how sleep drives your hormonal health.
Best Time to Workout for Testosterone
Your testosterone peaks in the morning, but does that make morning workouts better? Here's what the research says about workout timing and hormonal optimization.
Does NoFap Increase Testosterone? What the Science Says
The famous 7-day testosterone spike is real — but the full picture is more complex. A look at the actual research on abstinence and testosterone levels.