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, Orange Smash, 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. BobbyParrish Facebook Nature's Lab CoQ10 200 mg + Alpha Lipoic Acid + Acetyl L Carnitine, 120 Vegetarian Capsules Costco costco shoppers you're making Lotus move fast These 15ct variety packs and plant powered concentrates have been flying at select Costco Business Centers. If you see them in your store, grab Kirkland Signature Super B Complex with Electrolytes, 500 Tablets Costco