Injectable l carnitine has 100% bioavailability and its a supplement, not steroid., Even as a natty you can use and it can also help you in your bulking process, not just in fat loss. , ., Baaki if The bright and the dark sides of L carnitine supplementation: a systematic review Journal of the International Society of Sports Nutrition Springer Nature Link MusclePharm L Carnitine 3000, Peach Nectarine, 3,000 mg, 16 fl oz (480 ml) Walmart.com Early research into L carnitine was often cited as underwhelming, showing negligible changes in muscle carnitine content and fat loss outcomes. However, these findings may have been limited by a short study window Sports, Liquid L Carnitine, Citrus, 32 fl oz (946 ml)