Testosterone is a male hormone, though women produce small amounts of it in their ovaries and adrenal gland. Men produce the greatest levels of testosterone in the male testes and a very small amount in the adrenal gland.
A testosterone levels chart is an effective resource for many men who believe their testosterone levels may be lower than normal.
Do be aware that testosterone levels in men, by age, weight, and lifestyle may differ and fluctuate. In most men, levels of testosterone typically peak at about age 40 to 50, and then naturally begin to decline with age.
Defining the “normal” range of testosterone levels
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As mentioned in the introduction, normal and ideal testosterone level for men by age depends on a number of factors. Testosterone is produced by the testicles, but that production is controlled by the pituitary gland located in the brain. In turn, the pituitary gland gets the command to increase levels of testosterone from the hypothalamus gland. Testosterone levels can fluctuate greatly depending not only on age, time of day, and health status.
It may help to take a look at a T- level by age chart on a reputable website such as the Mayo Clinic. Other government and university resources also provide adequate and reliable information regarding testosterone levels and provide their own testosterone level chart access, but do be aware that ranges are just that – they define average levels of testosterone.
If you feel that your testosterone levels are low (low T) or you’re experiencing unusual side effects or symptoms that you feel are associated with testosterone hormone production, schedule a visit with your doctor.
The Mayo Clinic provides a testosterone levels chart for male newborns to adult males. It looks somewhat like this:
| Age | T level (ng/dL) – nanograms per deciliter |
| 0 to 5 months | 75 to 400 |
| 6 months to 9 years | <7 to 20 |
| 10 to 11 years | <7 to 130 |
| 12 to 13 years | <7 to 800 |
| 14 years | <7 to 1200 |
| 15 to 16 years | 100 to 1200 |
| 17 to 18 years | 300 to 1200 |
| 19 plus years | 242 to 950 |
| Average adult male | 270 to 1070 |
As you can see, the levels of testosterone (nanograms per deciliter) vary widely during adolescence and then generally remain static from about 19 to 20 years of age to 40 years of age.
Common Symptoms of Low Testosterone Levels
As mentioned, normal free testosterone levels by age gradually decrease after about 40 years of age. Some of the most common signs of low testosterone levels have to do with sex drive. For example:
- Erectile dysfunction or impotence
- Reduced number of spontaneous erections
- Reduced libido
- Infertility.
What Does Testosterone Do?
Sexual behaviors are not the only aspects of low testosterone levels. A male experiencing decreased testosterone levels by age may experience both physical and emotional or mental changes. Lack of motivation decreased self-confidence, and reduced muscle bulk are common. Along with the reduced muscle, bulk comes a lack of muscle strength and sometimes decreased bone density, and an increase in body fat.
Such symptoms are relatively common to both men and women who reach post-maturity and head into their senior years. Low testosterone in men is often equated to low estrogen levels in women going through menopause.
If you feel you’re experiencing low testosterone production, it’s important to visit your doctor to determine whether that decrease is part of the natural aging process or if there’s something going on with either the testicles (sperm production), the pituitary gland, or the hypothalamus.
Resisting the Urge to Self-Diagnose Low Testosterone Levels
As mentioned, levels of testosterone can fluctuate. Like any hormone, the endocrine and metabolic systems may be impacted by diet, stress, lifestyle, and weight. Low testosterone levels may not be an issue with sexual organs at all, but the result of dysfunction or malfunction of the pituitary gland. The pituitary gland is responsible for the maintenance and function as well as orders to synthesize hormones and secretions of all hormones in the body. If the pituitary gland is malfunctioning, it can have an effect on multiple hormone glands.
Undergoing testosterone treatments or taking drugs (prescription or over-the-counter) without ascertaining what’s causing the low levels of testosterone can result in side effects as well. Too much testosterone in the body can throw those levels you saw in the testosterone level chart out of whack and impact multiple body systems.
Hormones are powerful components in the body and careful balances must be maintained for optimal health and wellness. Testosterone levels in men by age, environment, and overall health status can vary from one to another. If you believe your testosterone levels are not adequate, schedule a visit with your doctor. A number of hormone replacement therapies are available for men with low testosterone. Through communication, you and your doctor can determine which method provides you with optimal benefits and health to get your bioavailable testosterone normal range back in order.
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