Coffee is one of the favorite supplements of all gym-goers. Not only does coffee boost your adrenaline, and makes you feel more energetic, but it also helps to burn off fat, and is an aphrodisiac. To further top this list, caffeine, the main ingredient in your cup of coffee also boosts cAMP levels. Elevated cAMP levels lead to increased testosterone production. Some studies show that caffeine also increases cortisol - the stress hormone, but the adverse effects are negligible since cortisol is a booster for only a short period after drinking your cup of coffee.
