Star ingredient retinol has long been considered the gold standard anti-aging ingredient and an essential part of a nighttime skincare routine. However, newly popular is the emerging body retinol category, made up of body lotions, body butters, body serums and more that all contain retinol or retinol derivatives in them. “There are many different uses for a body retinol, such as anti-aging, acne, hyperpigmentation and keratosis pilaris,” says Aya Ahram, M.D., board-certified dermatologist at Hudson Dermatology and Laser Surgery.