In recent years, researchers (and pharmaceutical companies) have focused on the effects of testosterone deficiency, especially among men. In addition, what may seem like a symptom of testosterone excess (see below) may actually be unrelated to this hormone. Testosterone levels are too carefully controlled by the brain for that to occur. When low testosterone combines with elevated cortisol or thyroid dysfunction, the fatigue becomes debilitating. Low testosterone is frequently overlooked in women but plays a critical role in arousal and sexual satisfaction. Identifying which hormones are involved requires comprehensive testing beyond a basic metabolic panel. Thyroid hormone deficiency produces similar cognitive effects. When estrogen drops, many women report difficulty with word recall, focus, and mental sharpness. But perhaps what’s more important is the overall trend of your testosterone level and whether you have symptoms. As more data becomes available, it’s likely that the reference ranges for testosterone will improve to include age-specific values. A normal testosterone level for adult men is around 8.7–29 nmol/L (250–836 ng/dL). 1st Optimal uses bioidentical hormones exclusively in our treatment protocols. Bioidentical hormones are structurally identical to the hormones your body naturally produces, while traditional (synthetic) hormones have a different molecular structure. Men typically experience gradual testosterone decline starting around age 30, losing roughly 1-2% per year. Testosterone is the main male hormone, but females also need it for healthy body functioning. However, laboratories may report levels down to 264 ng/dL as within the normal range. Some research also suggests that high levels of prenatal testosterone levels may be linked to autism in children. A 2018 study in 60 children found that testosterone levels in the womb may also affect how your right and left brain function. The optimal testosterone range for men seeking symptom resolution is generally considered to be in the upper quartile of the healthy young adult range—typically 700 to 1100 ng/dL. Healthy testosterone levels are also important for people assigned female at birth, along with other key hormones such as estrogen and progesterone. For example, a 50-year-old man with testosterone levels of 8.5 nmol/l but no symptoms would unlikely benefit from treatment, even though his levels are outside the normal range. For men with low blood testosterone levels and symptoms most likely caused by a low level, the benefits of hormone replacement therapy usually outweigh potential risks. While there’s a clinical reference on "healthy" levels of testosterone, there’s no established information on the optimal range to diagnose abnormal levels in women. Below is a chart representing the normal range for female testosterone levels by age and ng/dL. Understanding male testosterone levels by age and knowing how to check test levels is essential for maintaining optimal health and well-being. Average testosterone levels by age help determine whether your levels are within a normal range or require medical attention. For men in their 50s, testosterone levels continue to decline, with the normal testosterone levels by age chart indicating a range of approximately 300–600 ng/dL. These tests provide a more complete picture of your hormonal health, allowing you to assess whether your testosterone levels are within the normal range by age. Keeping those caveats in mind, in one study (2) of healthy adult males between the ages of 40 and 70, researchers observed these normal total testosterone levels. Testosterone therapy may make sense for women who have low testosterone levels and symptoms that might be due to testosterone deficiency. Free testosterone represents the fraction your body can actually use. Most men are told their testosterone is normal based on total testosterone alone. As insulin resistance increases, testosterone production may decline further, accelerating hormonal imbalance. That said, average testosterone levels for healthy men can be used as a baseline. Research shows that testosterone levels vary widely between individuals and are influenced by multiple factors, including overall health, genetics, body composition, sleep quality, stress, and lifestyle habits. They will assess your symptoms and test your testosterone levels to help provide a diagnosis and develop a treatment plan, if necessary. It's a scientific fact that testosterone levels decline with age. Because testosterone fluctuates daily, a single test rarely tells the full story. Symptoms, not just test results, should guide diagnosis and treatment. Two men with the same level may feel completely different.
