Is L carnitine completely useless?, No, while oral l carnitine has minimal effect, acetyle L carnitine form is generally more bioavailable, it may not be show a drastic change, but it does help SportExpert L Carnitine 1800 mg solution for oral use 50 ml 8 pcs Evalar Buy online Revisiting the Role of Carnitine in Heart Disease Through the Lens of the Gut Microbiota 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: Benefits, side effects, and dosage