L carnitine helps transport fatty acids into your cells' mitochondria, where they can be used for energy. That's why it's often marketed for fat loss and energy support. Common use: People usually take NOW Foods L Carnitine 1000 mg, 50 Tablets Walmart.com Nutraxin L Carnitine 700 Mg 60 Tablets 700 Mg L Carnitine Energy & Fat Metabolism Support Trendyol trans 2 Octenoyl L carnitine CAS 152064 94 3 Cayman Chemical Biomol.com