This natural plant chemical increases the amount of calories your body burns, thanks to its ability to raise epinephrine levels. A study from the University of Oklahoma found that subjects who took a supplement that contained both capsaicin and caffeine burned more calories both during exercise and afterward. Look for capsaicin or cayenne pepper supplements that list Scoville Heat Units (SHU), and take about 40,000 – 80,000 units. Take the supp 30 minutes before meals two to three times per day, and one of those doses should be taken 30–60 minutes prior to workouts.
Capsaicin is commonly from chili peppers.