2. Chilli Peppers help to ramp up your metabolism. Capsaicin is the compound that is the source of a Chilli pepper’s spiciness. It is an alkaloid compound found primarily within the seeds and veins of a pepper, and it seems to be a veritable fount of good health. It is thought that the heat you experience as you eat the Chilli can also increase your body temperature. Known in the scientific community as thermogenesis, this production of heat requires increased work from your metabolism.