Did You Know? Some people report a fishy smell after supplementing with L carnitine. This happens because certain gut bacteria convert carnitine to trimethylamine, a malodorous compound found in rotting fish. Impact of sleep disorders on mental health: A systematic review The mechanism of action, side effects and clinical application of L carnitine Comparison of short term and long term effects of peroral L carnitine intake: clinical implications of elevated TMAO levels in cardiovascular complications A carnitine transporter at the bloodbrain barrier modulates sleep via glial lipid metabolism in Drosophila PNAS L Carnitine Side Effects & Risks