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. What you eat can influence how you smell and even how attractive you seem to others. Foods like garlic, onions, and cruciferous vegetables (broccoli, cabbage) contain sulfur compounds that affect body L Carnitine is Underrated. New Meta Review Reminds Us Why. Carnitine Deficiency: What Is It, Causes, Symptoms, and More Osmosis L Carnitine Is it Worth Taking? Ideal Nutrition L Carnitine injection is recommended at 1 ampule every 2 3 days for best results. The L Carnitine is taken intravenously either by normal injection or using a butterfly needle. After taking this L Carnitine, you