Hair Loss Testosterone
Testosterone production declines naturally with age. Testosterone deficiency (TD) may result from disease or damage to the
hypothalamus, pituitary gland, or testicles that inhibits hormone secretion and testosterone production, and is also known
as hypogonadism. Depending on age, insufficient testosterone production can lead to abnormalities in muscle and bone
development, underdeveloped genitalia, and diminished virility.
Testosterone production increases rapidly at the onset of puberty and decreases rapidly after age 50 (to 20–50% of peak level by age 80). Recent estimates show that approximately 13 million men in the United States experience testosterone deficiency and less than 10% receive treatment for the condition.