system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do vitamin pills smell so awful?

Most tubs of supposedly healthy vitamins or other supplements stink when you take the lid off. Why?
gpt
What all is on the label?

Most vitamins don't smell too bad by themselves. Some things, like Choline or L-Carnitine have a pungent fishy smell. As do any omega 3/6/9 products, even plant derived ones. Any fruit/vegetable powders in it?