Castor oil and derivatives are used in soaps, creams (tretinoin), shampoos, perfumes, lip gels, lipsticks, hair oils (increases hair luster), deodorants, lubricants, sunscreens, and many other personal hygiene and beauty products. Castor oil has been used in skin care products for centuries, and continues to play an important part in the production of soaps and cosmetics. Cosmetic manufacturers use castor oil and its derivatives in formulating non-comedogenic cosmetics (cosmetics that don't & that exacerbate or contribute to acne) and emollients.