L carnitine: Health Benefits, Side Effects, Uses, Dose & Precautions If you always smell sweaty, sour, or like onions, you need to check your gut because most body odor starts inside; constipation, yeast overgrowth, and poor bile flow create toxic sweat, so Does Carnitine Cause Body Odor? Lume Deodorant L Carnitine is not a magic fat burner It won't melt fat, build muscle, or replace hard work. The only thing it burns is your money Stick to the basics