L Carnitine Shots are ampoules containing liquid L Carnitine. Benefits of L carnitine injections are aplenty! This injection is a great way to boost your energy levels, help with weight management, and even promote healthy heart function. Studies show that Benefits of L carnitine injections are aplenty! This injection is a great way to boost your energy levels, help with weight management, and even promote healthy heart function. Studies show that Unlock Peak Performance & Fertility with L Carnitine! Did you know that injectable L Carnitine is a game changer compared to oral supplements? While oral L Carnitine has low bioavailability (only ~14 18% L Carnitine: Benefits, side effects, and dosage