Gut Derived Metabolite, Trimethylamine N oxide (TMAO) in Cardio Metabolic Diseases: Detection, Mechanism, and Potential Therapeutics 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. Amazon.com: Nutricost Acetyl L Carnitine (ALCAR) 500mg, 180 Capsules, 180 Servings Non GMO and Gluten Free, 1 Capsule per Serving : Everything Else Chocolate boosts happiness by increasing serotonin, a neurotransmitter that regulates mood and promotes calmness, and endorphins, the body's natural painkillers that create a sense of euphoria and reduce stress. Foods that affect feminine odor Optimizing endurance performance in elite swimmers: effects of L carnitine supplementation and hydration strategies Applied Water Science Springer Nature Link