Testosterone Levels by Age – Everything You Need to know

Testosterone is one powerful hormone that is present in both males and females. It is the primary hormone responsible for controlling the sex drive, regulating the production of sperm, increasing the muscles and energy. Testosterone can event influence the behavior of humans like aggression, mood swings, and competitiveness. However, as you grow older, there is a decline in the level of testosterone in your body.

Testosterone Levels by Age

When low testosterone levels happen, it leads to many changes like reduced sex drive, low energy, mood fluctuations, being tired all the time, and more. While it may seem like this matter is concerning, it is a natural part of aging.


Normal testosterone levels

Free Testosterone levels pg/ml by age is usually the preferred method for determination of T-level. But you might have a question in mind regarding ‘ what is average free testosterone level by age?’. You do not need to have any more doubts in your mind as we are going to discuss all the details regarding testosterone and age in this article.


Testosterone level by age can be a very fascinating topic because there is no definite answer to it. The average level in the body varies from individual to individual and depends on the function of the thyroid, protein status, and many other factors. A man should typically have a level of a minimum of 300 nanograms per deciliter. Normal free testosterone levels in females range from 8 to 60 nanograms per deciliter after the age of 19 and above. The level of testosterone in humans reaches a peak at around 18 or 19 and keeps on declining throughout adulthood.


Testosterone is mandatory for the healthy development of the fetus during pregnancy. It regulates the development of the male reproductive system. The testosterone levels in the women may also affect the function of the right and left brain. The testosterone levels reach their highest during adolescence and puberty period of an individual.


Normal testosterone levels in men by age shows the fundamental physical science in boys during puberty. Their voice changes, their shoulders get broader, and their formal structure gets more masculine. When men get older, the testosterone level may decrease by about 1% each passing year after they reach the age of 30. Testosterone is mainly developed in the ovaries in the case of premenopausal women. After reaching menopause, normal testosterone levels in females keep on decreasing between the ages of 45 and 55.


Testosterone levels by age is a topic which does not end after you become an adult. What is the normal testosterone level for a 70-year-old man? Again, the level of testosterone in the body cannot be determined in a fixed amount. It varies from person to person, depending on many factors and health conditions. But it is an inevitable fact that the levels keep on declining after 30.


To get into more details, let us discuss testosterone levels by age in-depth-


  • For infants between 0 to 5 months, the level of testosterone is 75 to 400 nanograms per deciliter in males and between 2 to 280 nanograms per deciliter in females.


  • Between the age of 6 months to 9 years, the level is less than 7 to 20 nanograms for decilitre in males and less than 7 to 20 in nanograms for decilitre in females.


  • Level in males is less than 7-130 nanograms per deciliter and less than 7-44 nanograms per deciliter in females between the age of 10 to 11 years.


  • Between 12 to 13 years of age, T level is between 7 to 800 nanograms per deciliter in males and less than 7-75 nanograms per decilitre in females.


  • The boys at 14 years of age have a testosterone level between 7 to 1200 nanograms per deciliter.


  • Between 15 to 16 years of age, the testosterone level is between a hundred to 1200 nanograms per deciliter.


  • Coming to puberty, boys between 17 to 18 years of age have a testosterone level of 300 to 1200 nanograms per deciliter.


  • After the age of 19 and more, the level of testosterone decreases to 240-950 nanograms per deciliter.


Effects of low testosterone levels

The deficiency of testosterone in the womb can affect how a male fetus develops. The flaw can also affect males during the property and may hinder their growth or development. Testosterone levels by age decrease in both men and women. In males lower, T level can cause-

  • loss of hair
  • reduce in muscles
  • skin getting fragile
  • reduced sex drive
  • extreme mood fluctuations
  • concentration issues.


In females, it can cause issues like-

  • Irregular periods
  • low sex drive
  • weak bones
  • fertility issues


Effects of high testosterone levels

High testosterone levels are kind of rare when it comes to adult males. In both the sexes, high testosterone levels main cause infertility. Polycystic ovary syndrome is one of the diseases which affects females due to the high production of testosterone by the ovaries. Also, if a person uses too many steroids, the level of testosterone increases in the blood. The excess level of testosterone production can lead to a decline in the quantity of sperm, which can intern lead to loss of sex drive.


Final words

As I discussed above in the article, testosterone levels by age are something that affects both men and women after a particular age. As a result, it is crucial to get checked if you have any doubts regarding whether the testosterone levels in your body is healthy or not. There are different supplements, therapy, exercises, and other natural methods available for treatment if such an issue occurs.


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