Bluebonnet L Carnitine 500 Mg (30 ct) Delivery or Pickup Near Me Instacart Amazon.com: Nutricost Acetyl L Carnitine (ALCAR) 500mg, 180 Capsules, 180 Servings Non GMO and Gluten Free, 1 Capsule per Serving : Everything Else The supplements aisle at Costco is loaded with lots of prodcuts, here's what I think of a few of them. 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