system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: why aren't the ingredients for salt just, salt?

Looking here at a salt packet from ncdonalds. What is sodium sulucoaluminate? Also, dextrose and potassium iodide are present. Why isn't salt just salt?
gpt
sodium sulucoaluminate is an anti caking agent. It keeps the salt from clumping together.

Iodized salt is often used because humans need iodine, and if a population lives far from the sea, that is an easy way to ensure everyone gets it.

Dextrose apparently stabilizes the iodine.