Retinoic acid is widely used in dermatology for treating acne and reducing the appearance of wrinkles. It promotes skin cell turnover, helping to unclog pores and improve skin texture. Additionally, it is effective in treating psoriasis by normalizing skin cell growth. In oncology, retinoic acid is utilized in the treatment of acute promyelocytic leukemia (APL), where it induces differentiation of leukemic cells, leading to their maturation and eventual death. It also plays a role in research for studying cell differentiation and development due to its involvement in gene expression regulation. In cosmetics, it is a key ingredient in anti-aging products for its ability to stimulate collagen production and reduce signs of aging.