Neem. It's not the most fragrant of oils, but I have a large bottle in my stash. Why? Because it works really well. When I came down with what later was diagnosed as walking pneumonia, it was a hot shower followed by covering myself in this malodorous oil and tightly cocooning myself in a large hooded robe that allowed me to feel better enough to get to the doctor. Neem is antifungal, antiviral and can help with a whole host of skin issues. But it's the natural insecticidal