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 Effect of L carnitine supplementation on lipid profile and apolipoproteins in children on hemodialysis: a randomized placebo controlled clinical trial Pediatric Nephrology Springer Nature Link The Right Way to Take L Carnitine to Boost Your Training Acetyl L Carnitine: Benefits and Side Effects Gene Food NKF KDOQI Guidelines A systematic review about prophylactic L carnitine administration in parenteral nutrition of extremely preterm infants