L Carnitine is an amino acid that supports weight loss as it is a fat burning supplement. L Carnitine Push is a direct and quick IV infusion procedure that can be done on a weekly L carnitine is a naturally occurring amino acid structure that is made in the human brain, liver, and kidneys. L carnitine plays a critical role in energy production, as it converts fat into energy. Didn't another study show carnitine was good for the heart? Amazon.com: Cutler Nutrition Liquid L Carnitine Fat Burner Supplement with Acetyl L Carnitine & L Carnitine Tartrate Fat Burner Formula for Optimal Absorption, Energy & Muscle Support Sour Gummy Flavor : Health &