Testosterone by Age Chart

Testosterone peaks in the late teens and early 20s. After age 30, total testosterone naturally declines at approximately 1-2% per year. By age 70, most men have T levels 30-40% lower than their peak. This gradual decline is called andropause or age-related hypogonadism.

Approximate total testosterone ranges by age group: 20s: 600-900 ng/dL, 30s: 500-800 ng/dL, 40s: 400-700 ng/dL, 50s: 350-650 ng/dL, 60s: 300-550 ng/dL, 70s+: 250-500 ng/dL. These ranges are approximate — labs differ slightly by method.

Testosterone decline is common but not inevitable. Lifestyle factors dramatically affect T maintenance. Men who maintain healthy body weight, exercise regularly with weights, sleep 7-9 hours, and manage stress effectively can maintain testosterone levels 10-20 years younger than sedentary peers of the same age.

TRT is indicated for men with clinical hypogonadism: symptoms of low T plus confirmed low blood levels on two separate morning tests. It has been shown to improve libido, muscle mass, bone density, and mood. However, it carries risks including infertility, polycythemia, and potential cardiovascular effects. Always consult an endocrinologist.