Carnitine: the claims and why it may not work Frontiers A perspective on intermittent fasting and cardiovascular risk in the era of obesity pharmacotherapy When To Take L Carnitine For Fat Loss? Weight Wise Weight Loss Center Losing weight with L carnitine supplements. Yes or no? L Carnitine is not a magic fat burner , It wont melt fat, build muscle, or replace hard work., The only thing it burns is your money , Stick to the basics Nutrition, Training & Consistency.