Testosterone Level By Age

Now that you have taken your Testosterone (T) level test , what does the result mean ?

Before we go any further , lets clarify the measurements used here.

T levels are either stated in nmol/L  ( nanomoles per liter ) or ng/dL ( nanograms per deciliter  ).

Conversion rate :

1 ng/dL =  0.0347 nmol/L

1 nmol/L = 28.818 ng/dL

 

Normal range of Testosterone in men is about 300 to 1200 ng/dL  and varies with age. The normal Testosterone level in women is just about 15-70 ng/dL . Now you know what makes a MAN !

The bad news is that Testosterone level decreases with age and decreases as much as 1% per year after age 30 . Worse still, the free testosterone decreases at a faster rate of 1.2% ! Studies have shown that total testosterone levels decrease by approximately 30% in healthy men between the ages of 25 and 75. Free testosterone levels decline even more significantly with decreases of approximately 50%

The following table by A.Vermeulen (1996) shows total testosterone levels by age as well as free testosterone and Sex Hormone-Binding Globulin (SHBG) by age

 

testosterone-by-age

 

Testosterone levels above or below the normal range are considered by many to be out of balance.

While Testosterone is generally associated with sexual characteristics of men , many people are not aware that T is  also responsible for  healthy libido, building muscle mass, and maintaining energy level. See image below on the effects of T.

Therefore an extreme deviation from the  normal T level should be investigated by a medical doctor.

Testosterone level below 300 ng/dL may generally be considered LOW . Low T level may result in a decline in physical energy, strength, stamina, and diminished mental aggressiveness. Moreover, men may experience more aches and pains in the bones and joints and they may also have a decline in libido and erections.

Men who have Testosterone levels that are higher than average may experience both benefits and drawbacks. The benefits, which are modest, include normalizing blood pressure and lowering the likelihood of obesity and heart attack. However, there is a tendency for such men to consume more alcoholic beverages, and they are more likely to smoke, and more likely to get injured. According to some researchers, the higher the testosterone level, the more likely men are to participate in risk-taking behavior (sexual, injury risk, and even criminal activity). Problem of high T are obviously rare and infrequent with middle aged and elderly men . for this age group it is more common to see a problem of low T rather than high T.

 

 

Effects of Testosterone

 

So how should you monitor your T level ?  Doctors have recommended that T level tests shoud be done every 5 years after age 35 . However if you are on some T therapy , the levels must be monitored closely , at least once in 6 months.

Anyone out here with high T ? Would really love to have a chat with you !