Oil is contained within a range of oilseeds, fruits, nuts and seed kernels. However, not all oil-bearing seeds and nuts contain edible oil. Some contain poisons or unpleasant flavours and are only used for paints. Castor oil needs very carfeul processing to make it safe and is not really suitable for small-scale processing. There is a universal demand for vegetable oils for household cooking, as an ingredient for other food products such as baked goods and snack foods and as a raw material for the manufacture of soap, detergents and body oils.