L Carnitine is Underrated. New Meta Review Reminds Us Why. Fast&Up L Carnitine 3000 mg Triple Action Formula for Faster Fat Burn Stacking your GLP 1 with L Carnitine. Yes! Your GLp 1, Sema,Trizapetide or Reta will create a calorie deficit & improves lipolysis, (the breakdown of stored fat) L Carnitine will support the transport Beneficial effects of l carnitine supplementation for weight management in overweight and obese adults: An updated systematic review and dose response meta analysis of randomized controlled trials ScienceDirect