Branched-chain amino acids (BCAA) can help repair and build muscle even when you can't make it to the gym! Muscle burns at least three times the number of calories as fat, which makes building muscle a priority for boosting metabolism. BCAA does just that by helping your body repair and rebuild muscle. Get the benefits by adding 1000 mg of BCAA powder to your morning smoothie. Always ask your doctor before starting a new supplement.