L Carnitine: Unveiling the Science Behind its Role in Effective Weight Loss Aesthetics 360 Lash & MedSpa 6 potential benefits of l carnitine Good Food L Carnitine injection is recommended at 1 ampule every 2 3 days for best results. The L Carnitine is taken intravenously either by normal injection or using a butterfly needle. After taking this L Carnitine, you Amazon.com: iSatori L Carnitine LS3 3000, Triple Blend Liquid L Carnitine Supplement, with Acetyl & Tartrate, Stimulant Free Energy, Low Calories, Sugar or Gluten, Keto Friendly, Lemon Lime (32 Servings) : Health & Household L Carnitine for Fat Loss: The Science Backed Secret to Shredding Safely