Does L Carnitine Help with Erectile Dysfunction? Acetyl L carnitine is a white crystalline solid that resembles snow. It has a mild odor similar to vinegar. It is a metabolite of L carnitine, derived from the amino acid L lysine in a series L Carnitine Injection Levocarnitine IV The Chemistry of Bad Smell Explained 1 Cadaverine Odor: Smell of decomposing dead bodies Chemical type: Diamine Formula idea: HN(CH)NH Source: Produced when proteins break down during decomposition Why it Is fish smelly? If you have ever caught fresh fish, you know that it doesn't have a particularly strong odor, maybe a hint of ocean water. But when fish are killed, bacteria 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.