We found this on healthy.net: What is L-carnitine? What is it supposed to do? NATE LEBOWITZ, MD: L-carnitine is an amino acid. Within the last five years, in good scientific research and journals, L-carnitine has proven to be very useful in a number of areas. It's proven effective in the treatment of congestive heart failure, in the treatment of patients who are first presenting with a heart attack, or with symptoms suggestive of a heart attack, or in people who have had a heart attack in whom you want to protect the heart from a dangerous remodeling of the left ventricle, the pumping chamber of the heart. Remember we are NOT Doctors and have NO medical training. This site is like an Encylopedia - there are many pages, many links on many topics. Support our work with any size DONATION - see left side of any page - for how to donate. You can help raise awareness of CAM.