When to Take L Carnitine for Optimal Training Benefits Transparent Labs 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 L carnitine for metabolism Lifehack L CARNITINE increases muscle mass, reduces fat mass. Bangkok Hospital Headquarter What Is Carnitine and Why Is It Important? The Amino Company Propionyl L Carnitine Erectile Dysfunction: What the Evidence Shows for Men Seeking Better Blood Flow Support