does cooking oil grow mold?
Coconut oil is naturally antifungal, as others have pointed out. It's a powerful remedy, for example, for fungal infections like jock itch. But while the oil itself is antifungal, mold and fungus can sometimes grow in containers of coconut oil, if moisture (water) or other contaminants have gotten in. A slight brown coloration in the bottom of a container of coconut oil is usually natural and can be ignored.