Alpha Mars from ATP Science

In both men and women, testosterone levels peak between 25 to 30 years of age and thereafter drop approximately 1-2% annually. At the age of 60, testosterone levels are typically only 40-50% of youthful levels and may be lower due to stress and related lifestyle issues such as diet, exercise, and sleep patterns. This lowering in testosterone has been linked to a poorer health outcome in many areas of life.