Age and Testosterone: What's Normal? 

Age and Testosterone: What’s Normal? 

testosterone levels vary throughout a man’s lifetime. In general, however, we can say that there are three main phases of testosterone production: childhood and adolescence, early adulthood, and middle age/older age.

Childhood and Adolescence:

Up until around the age of 20 or so, testosterone levels are relatively high. This is the time when boys go through puberty and start to develop the physical characteristics of adult men such as facial hair, deepening of the voice, and muscle growth. 

Early adulthood:

From around the age of 20-30, testosterone levels start to decline at a rate of about 1% per year. This decline is usually not noticeable or problematic. During this time, most men still have plenty of testosterone for things like sex drive, energy levels, and mood. 

Middle age/older age:

After the age of 40 or 50, testosterone levels decline more steeply at a rate of about 2% per year. This can result in some symptoms such as fatigue, loss of sex drive, erectile dysfunction, decreased muscle mass, and depression. In some cases, doctors may diagnose “low T” and recommend testosterone replacement therapy. 

Testosterone is a hormone that is responsible for many things, including the development of male reproductive tissues, body hair, and muscle mass. It also plays a role in maintaining bone density and red blood cells. Unfortunately, testosterone levels start to decline slowly after the age of 30. The average man will have lost about 1% of his total testosterone each year by the time he reaches middle age. 

So, what does this mean? Well, you may not notice any major changes in your body if you’re in your 30s or 40s. However, by the time you reach your 50s or 60s, you may start to experience some of the following symptoms: 


-Difficulty concentrating 

-Loss of muscle mass 

-Decreased libido 

-Erectile dysfunction 

-Hot flashes 

-Weight gain 


Testosterone levels naturally decline with age. The exact rate of decline varies from one man to the next, but it is generally a slow and gradual process that begins around the age of 40. By the age of 60, most men have testosterone levels that are approximately half of what they were in their 20s. 

There are several factors that can contribute to a decline in testosterone levels, including injury or disease, medications, stress, obesity, and drug use. However, the most common cause of low testosterone is simply aging. 

A number of symptoms can be associated with low testosterone, including fatigue, loss of muscle mass, depression, anxiety, and low sex drive. If you are experiencing any of these symptoms and think you may have low testosterone, it’s important to see your doctor for tests and treatment options. 


Age is just one factor that can affect your testosterone levels. Other things like stress, weight, medications, and illness can also play a role. If you’re concerned about your testosterone levels, talk to your doctor for a blood test to find out where you stand.

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