Testosterone and Obesity in Men: a Direct Link

Men with low testosterone are often obese, and obese men often have low testosterone.

Coincidence? Not at all. 

You don’t have to be overweight to have low testosterone. But the more overweight you are, the more likely your testosterone level will be low. And for most men, as you age and gain weight, your testosterone level will fall.

Fat isn’t static; it’s an organ that produces estrogen. Increased estrogen from fat decreases testosterone production, which leads to more fat! 

In 2013, several studies showed:

  • Being obese is a significant reason for low testosterone.
  • Three quarters of men who are “very obese” (approximately 295 lbs for a man six feet tall) have low testosterone.
  • No matter what age a man is (including teenagers), being obese is linked to low T.
  • Your body produces less and less testosterone as you get older due primarily to weight gain.  

Testosterone supplementation can help bring testosterone to optimal levels, making it easier for many men to lose weight and thereby enhance their body’s ability to make testosterone. 


For further information, consult the original research here:

Age-associated changes in hypothalamic-pituitary-testicular function in middle-aged and older men are modified by weight change and lifestyle factors: longitudinal results from the European Male Ageing Study

Determinants of testosterone recovery after bariatric surgery: is it only a matter of reduction of body mass index?

Testosterone concentrations in young pubertal and post-pubertal obese males

The role of obesity and type 2 diabetes mellitus in the development of male obesity-associated secondary hypogonadism