Cosmetics are constituted mixtures of chemical compounds derived from
either natural sources, or synthetically created ones. Cosmetics have
various purposes. Those designed for personal care and skin care can be
used to cleanse or protect the body or skin. Cosmetics designed to enhance
or alter one's appearance (makeup) can be used to conceal blemishes,
enhance one's natural features (such as the eyebrows and eyelashes), add
color to a person's face, or change the appearance of the face entirely to
resemble a different person, creature or object. Cosmetics can also be
designed to add fragrance to the body.
Learn more from Wikipedia about the origin of cosmetics