Testosterone is a hormone. It's what puts hair on a man's chest. It's the force behind his sex drive. During puberty, testosterone helps build a man's muscles, deepens his voice, and boosts the size of his penis and testes. In adulthood, it keeps a man's muscles and bones strong and maintains his interest in sex. In short, it's what makes a man a man (at least physically). After age 30, most men begin to experience a gradual decline in testosterone. A decrease in sex drive sometimes accompanies the drop in testosterone, leading many men to mistakenly believe that their loss of interest in sex is simply due to getting older. Many of the symptoms of low testosterone are mirrored with other medical problems; that is, other medical problems may arise as a result of low testosterone; including, but not limited to, diabetes, depression, high blood pressure, and coronary artery disease – many of these stemming from obesity:
- Fatigue or decreased energy.
- Reduced sex drive (libido)
- Sexual dysfunction (weak erections, fewer erections)
- Depressed mood.
- Increased body fat.
- Reduced muscle mass and strength.
- Decreased bone strength.
- Loss of body hair (reduced shaving)