L carnitine and CVD Today's Dietitian Magazine Dont waste money on supplements like L carnitine. First focus on your diet and training. Also, oral L carnitine has low bioavailability. Injectable forms may absorb better, but diet and training 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 Nutrasal, LipoZome B, 2 fl oz Injectable vs Oral L Carnitine: Which Works Better? AWP