When should I take L carnitine? (L Carnitine) Your body already makes L Carnitine, so why do people take it as a supplement? Because while it helps burn fat for energy, it only works when paired with the right lifestyle., So before you jump on Acetyl L Carnitine Capsules 500mg Simply Supplements When To Take L Carnitine to Maximise Your Shredding and Beyond BSc Supplements Amazon.com: Liquid L Carnitine 3000 Plus Advanced 4 in 1 Formula with Acetyl L Carnitine, L Tartrate, ProGBB & Vitamin B, Stimulant Free High Absorption L Carnitine Supplement for Energy & Metabolism, 16oz : Health & Household