The effect of l carnitine supplementation on mortality and clinical outcomes in ventilator dependent critically ill patients with obesity and COVID 19: Protocol for a randomized double blind placebo controlled trial ScienceDirect L Carnitine is Underrated. New Meta Review Reminds Us Why. CARNITINE (L CARNITINE, ACETYLCARNITINE) Neuroneeds Is Acetyl L Carnitine associated with frequent side effects like headaches in children with ADHD? Consensus Side Effects The Life Raft Group 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