PremiumKathleen FeltonWashington Post·3 Aug, 2026 12:00 AM8 mins to readAge, sleep, stress and alcohol consumption can all contribute to fluctuating testosterone levels. Photo / 123rfSleep, diet and other factors can cause regular fluctuations for men.
Most people know it as the major male sex hormone, but testosterone plays important roles throughout the body, including maintaining muscle mass and bone health, and supporting sperm production. In women, testosterone has a smaller but still critical role
