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 Does Costco Sell L Carnitine Elemental Performance Multi Carnitine 2 Frascos de 60 Cp The supplements aisle at Costco is loaded with lots of prodcuts, here's what I think of a few of them. Kirkland Signature CoQ10 300 mg., 100 Softgels Costco