There are three categories of oil: Mineral oil, animal oil and vegetable oil.
As the skin cannot absorb mineral oil, it is used to remove makeup. It is also used as an ingredient, for moisturizing, in skin-care products.
Sheep's oil can be used to moisturize a person's skin. However, some people are allergic to it, or develop acne after using it. The oils from few other animals are used as beauty products.
Vegetable oil is a common ingredient in cosmetics, as the skin can easily absorb it.
