Cashew oil

Cashew oil refers to oil extracted from the fruit of the cashew. The cashew nut has a shell with an oily outer layer, and a hard inner layer, within which the familiar cashew nut is contained. Cashew shell oil comes from the outer shell. It is toxic to humans, and is normally considered a waste product. Some work, however, showed that cashew shell oil can be useful in fighting dental cavities. Other uses of cashew shell oil have been explored, including as an additive to brake fluid, to reduce brake fade and brake lining wear.