Retinoic acid is a metabolite of vitamin A that plays a crucial role in various biological processes, including cell growth, differentiation, and development. It is essential for maintaining healthy skin, vision, and immune function. Retinoic acid works by binding to specific receptors in the cell nucleus, influencing gene expression and promoting cellular changes. In dermatology, retinoic acid is commonly used in topical treatments for conditions like acne and psoriasis. It helps to unclog pores, reduce inflammation, and improve skin texture. Additionally, retinoic acid is known for its anti-aging properties, as it can stimulate collagen production and enhance skin elasticity.