Carnitine, Carnosine & Creatine OH MY! Dr Michael Greger of Nutritionfacts.org Creatine vs L Carnitine: Benefits and Key Differences Wellversed Frontiers Association between fatigue, peripheral serotonin, and L carnitine in hypothyroidism and in chronic fatigue syndrome L CARNITINE increases muscle mass, reduces fat mass. Bangkok Hospital Headquarter Creatine Vs L Carnitine, Key Differences:, Creatine primarily aids in increasing muscle mass and strength when combined with other supplements like L carnitine., L carnitine seems more effective for