The occurrence of frothing or foaming fat can be observed while frying fries as well. This is a very ordinary and entirely normal occurrence. Despite being a liquid, oil doesn't contain moisture.

It’s typically safe to reuse cooking oil, but there are some precautions you should take. Avoid reusing oils that were used ...

Dimethylpolysiloxane is a type of silicone that's commonly used in frying oil to keep down the foam. It's a compound also known as polydimethylsiloxane (PDMS), approved by the U.S. Food and Drug ...