Coffee contains caffeine, a stimulant substance that is proven to increase the release of fats from the fat tissues and boost the resting metabolic rate.

From soluble coffee to decaf instant to frozen concentrate, we thoroughly tested a ton of instant coffees to find the very best, including Commeteer, Verve, Canyon, and Swift.

Caffeine can kick start your senses within 15 minutes. See exactly what caffeine does to your body with this interactive graphic.