L Carnitine Injections for Weight Loss The Right Way to Take L Carnitine to Boost Your Training L Carnitine Linus Pauling Institute Oregon State University 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 Tirzepatide Vitamin B6 (Pyridoxine) Injection Kare Pharmacy LEVOCARNITINE INJECTION, USP1 g per 5 mL vial and 4 g per 20 mL vialFOR INTRAVENOUS USE ONLYRx Only