The article explains that age is only one factor affecting testosterone. Body composition, sleep quality, physical activity, smoking, alcohol use, and certain health conditions can also influence hormone levels. I found the information about sleep especially interesting because insufficient sleep has been associated with lower daytime testosterone. This makes the topic more complicated than simply saying testosterone decreases because of age Individual health and lifestyle can have an important influence on hormone levels https://ways2well.com/blog/when-does-testosterone-peak-in-men