Research suggests that excessive alcohol consumption can decrease testosterone levels. A 2019 study involving 2,295 teenage boys and men found that impaired sleep could be linked to lower levels of testosterone. Additionally, a 2020 review found that taking a vitamin D supplement increased testosterone levels and improved erectile dysfunction. Some research shows that low vitamin D levels may be linked to lower testosterone levels. Hormone levels begin shifting in the 30s for both men and women. These tests reveal the full landscape of your hormonal health, not just isolated numbers, but how your hormones interact, metabolize, and affect your daily function. BHRT can address estrogen and progesterone deficiency, improving symptoms like hot flashes, mood instability, bone loss, and cognitive decline. Treatment depends on which hormones are affected, how significantly they’ve shifted, and your individual health profile. The DUTCH (Dried Urine Test for Comprehensive Hormones) test measures hormone metabolites, showing not just how much your body produces but how it processes and eliminates hormones. Reference-range work helps place this in context. But that is a diagnostic threshold, not a universal treatment target. The AUA guideline is often cited because it uses a total testosterone below 300 ng/dL as a reasonable diagnostic cutoff for testosterone deficiency. This is why guidelines talk more about physiologic replacement and appropriate monitoring than about one universal "optimal" number. A woman being treated for hypoactive sexual desire disorder should not be guided by the same lab framework used for male hypogonadism (Bhasin et al., Journal of Clinical Endocrinology & Metabolism, 2018; Parish et al., Climacteric, 2021). However, once you’re in your late 20s, you’ll want a baseline to compare against as you age, says McDevitt. You used to have to go to the doctor’s office, or to a clinic that specializes in hormone evaluation. You want smooth blood flow, so an increase in red blood cells could easily cause stagnation. It’ll cause the red blood cells to overproduce which can, in turn, create a clot in your blood vessels. "If you think about bodybuilders who are doping, they always have injuries and this is why," says McDevitt. The designation of "healthy range" for testosterone levels depends on age and laboratory assay. As males age, their testosterone levels may decline by up to 2% annually after age 30 years. Learn more about testosterone levels by age, as well as symptoms and management tips for abnormal testosterone levels.
