Fat-burners are over-the-counter supplements that typically blend different kinds of herbs and stimulants to raise your core temperature, which can help you burn more calories at rest and during exercise, and suppress appetite. Common ingredients include green tea extract, caffeine, synephrine, capsicum, raspberry ketones, and garcinia cambogia.
Synephrine is a substance found in a variety of citrus foods, such as mandarin and clementines. Recent research suggests it’s safe for the heart and may increase resting metabolic rate. Capsicum, the chemical that makes hot peppers taste spicy, is generally used for pain relief, and a 2011 Chemical Senses review suggests capsicum consumption may benefit weight loss. Caffeine and garcinia cambogia act as appetite suppressants, which help you keep portions small and junk-food cravings at bay.
Fat-burners can increase your metabolism, give you more energy, suppress hunger, and increase your core temperature so you indirectly burn more calories. However, watch out for side effects of these ingredients and be sure to not combine them with other stimulants or medications. Here are 10 of the best supplements for weight loss.