Build Muscle with L Carnitine JYM L Carnitine L Tartrate Most people think L Carnitine is just for fat burning, but it does way more than that. Theres a reason I recommend it for recovery and muscle support and it has everything to do with what happens LL Cool J's Platinum 360 Diet and Lifestyle: A Full Circle Guide to Developing Your Mind, Body, and Soul: LL COOL J, Dave Honig, Chris Palmer, Jim Stoppani: 9781605295411: Amazon.com: Books Supplement Breakdown: Carnitine