The main reason why people may experience a fishy taste, smell, or burp when taking #fishoil is that they are not taking a high quality #fishoilsupplement. When it comes to manufacturing Unlocking the Health Benefits of L Carnitine and Potential Side Effects Your Health Magazine Trimethylaminuria: Definition, symptoms, and more Acetyl L Carnitine Allergy: Symptoms and Treatment Options (2026) Wyndly Carnitine: Genetic Variants Affecting Mitochondrial Energy and Health 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.