What Is L Carnitine? How Does It Work? Injectable L Carnitine: What It Is, How It Works, and Who Should Use It Mesotherapy Cocktails, Exosomes Regenerative Skin Boosters 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 How to Take L Carnitine Liquid: Complete Guide The Science of Good Health From brain to muscle, L Carnitine plays a key role in energy metabolism, endurance, and recovery by supporting efficient fat to energy conversion.