Caffeine is one of the few proven weight-loss supplements available in the market. You may have heard that exercise helps you burn off calories, and that is true, but most of the calories you burn throughout the day are due to metabolic function. It takes a lot of energy to keep your heart beating, your lungs breathing, and your body warm.

Coffee and other caffeinated drinks help increase your metabolic rate, which increases how many calories you burn while being idle throughout the day. It also increases how many calories you'll burn when exercising.

Try to get your caffeine from coffee and tea, or see a doctor about taking weight-loss supplements. Be careful about prescribing yourself pills that contain caffeine, as high doses of the substance can cause heart problems.