Know of any? List them below, please do not post any medications that aren't FDA approved I do not want to end up in the hospital.
There are number of pills in market, but what i am sharing is personally tried by my brother. Liver-52, my brother was so happy with the results that it improves digestion and also helps to clear stomach well. But he also said that, too much reliance on it could reduce my body's ability to work on the same mechanism, although its good for short span.
Rest you can look for green tea- as it is evident to increase metabolism of our body, then apple vinegar, use of coconut oil in cooking will definitely help.
Use of nuts and proteins in diet also helps to enhance our body metabolism.