Exploring Zn(II) Acetyl l carnitine complex for simultaneous management of depression, chronic pain, and neuroprotection ScienceDirect Frontiers Association between fatigue, peripheral serotonin, and L carnitine in hypothyroidism and in chronic fatigue syndrome Let's cut through the marketing noise and look at the actual science of fat loss. A lot of supplements make big claims, but L Carnitine is heavily backed by research for its L Carnitine Fumarate with Biosint Carnitine, 60 Veggie Caps (500 mg per Veggie Cap) 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. Biomedical Reports