How to Increase Your Testosterone Levels to get muscular body 1. Fat Loss The fatter you are = The less testosterone you'll have because your body fat contains an enzyme called aromatase that turns your manly testosterone into womanly estrogen making your testosterone levels drop so as you lose weight You'll naturally increase your testosterone by 57% with this follow method. The less fat you have = the more testosterone you'll have because you won't have as much aromatase going around turning your testosterone into estrogen. Losing fat is so important for higher testosterone that even testosterone replacement therapy (TRT) where a doctor gives you more testosterone would not work for you while you're fat because you're just making more testosterone available to be converted into estrogen by aromatase.