Carnitine Deficiency: What Is It, Causes, Symptoms, and More Osmosis 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. Understanding the Role of Carnitine in TPN and IDPN Therapy L Carnitine: Does it help with weight loss? Comparison of short term and long term effects of peroral L carnitine intake: clinical implications of elevated TMAO levels in cardiovascular complications Acetyl L Carnitine for Erectile Dysfunction: What the Evidence Shows and How to Use It Practically