Testosterone a natural hormone produced primarily in the testicles. This hormone regulates sex drive, influences mood and masculine characteristics.

Over time, testosterone levels will decrease with age. Obesity, stress, and chronic diseases can all contribute to decreased testosterone. Low levels of testosterone aka low T (hypogonadism) can cause the following:

• Low of lean muscle
  Decrease in sex drive (libido)
• Feelings of sadness or grumpiness
• Less frequent or weaker erections
• Lack of energy, strength or endurance
• Decline in ability to play sports
• Fatigue
• Lack of focus and mental clarity