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. L Carnitine Supplement Shop Sports Nutrition NOW Sports Is L carnitine harmful to the skin? Typology l Carnitine reduces reactive oxygen species endoplasmic reticulum stress and maintains mitochondrial function during autophagy mediated cell apoptosis in perfluorooctanesulfonate treated renal tubular cells Scientific Reports Effects of l carnitine supplementation on blood pressure: a systematic review and meta analysis of randomized controlled trials Journal of Human Hypertension