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 L Carnitine Injection Levocarnitine IV Does L carnitine cause fishy body odor? Surprising Truth and Solutions Tonum 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