L Carnitine (500mg) NutraBio Brands Alani Nu Energy Variety Pack Mini's 24 CT 8.4 oz (#1960777) $21.99 Amazon.com: Ronnie Coleman Signature Series L Carnitine XS 3000 Liquid, Amino Acids Metabolism and Lean Muscle Strength Support, Stimulant Free, Sugar Free, Zero Carbs, Blue Razz, 16 Oz : Health & Household The supplements aisle at Costco is loaded with lots of prodcuts, here's what I think of a few of them. L Carnitine Costco Nutrex Research L Carnitine 3000 Premium L Carnitine Liquid Shots Stimulant Free Workout Drink Transforms Fat Into Energy and Supports Muscle Recovery For Men and Women 31 Serv (Berry Blast) Walmart.com