Well men suffer a decline in testosterone starting at around age 35 and remarkably about 40% of men 45 and older have levels of testosterone that are viewed by the medical community as inadequate.

Physicians must also be careful not to overdose. Higher than normal levels of testosterone have been shown to cause dangerous mood swings. Vin Tangpricha, MD, PhD …The testicles will atrophy and ...

A ‘normal’ testosterone level typically ranges from 8-31 nmol/L (nanomoles per litre) of blood, depending on your age and health. Most endocrinologists adhere to the ‘enough is enough ...

Aromatase inhibition improved testosterone levels to the mid-normal range and did not alter prostate-specific antigen levels or urinary-obstructive symptoms, but failed to improve body composition ...

Testosterone also influences mood and energy levels. Age is a major determinant of testosterone levels, notes StatPearls.

Dr. Nancy Nagpal, a gynecologist at Salubritas Med Center, explains what happens when there is less or more testosterone in the body and what should be its normal level in men and women.