Seed oils are problematic due to chemical processing, plastic packaging leaching antimony, and oxidation from light and oxygen exposure.

“seed oils are the worst incarnation of these polyunsaturated fats in my belief because they are refined bleached and deodorized extracted with hexane sodium hydroxide horrible horrible things that end up being residual in the actual seed oils the plastic containers that seed oils are in leech antimony into the seed oil they're becoming more oxidized and rancid on the Shelf being exposed to light and oxygen and a clear bottle no seed oils are packaged in opaque glass bottles anymore”