New York State Cosmetology Practice Exam 2025 – Complete Prep Guide

Alpha hydroxy acids (AHAs) are commonly used in facial products specifically for their exfoliating properties. These natural acids, derived from fruits such as sugar cane, milk, and citrus, work by loosening the bonds between dead skin cells on the surface of the skin. This process helps to remove dead skin, promoting cell turnover and revealing fresher, healthier skin underneath. Not only does this enhance the skin’s texture and appearance, but it also allows for better absorption of other skincare ingredients, making them more effective.

Other ingredients listed, such as Vitamin E, hyaluronic acid, and retinol, serve different purposes in skincare. Vitamin E is primarily known for its antioxidant properties and its ability to nourish and protect the skin. Hyaluronic acid is renowned for its hydrating properties, helping to retain moisture in the skin rather than exfoliate. Retinol, a form of vitamin A, does have some exfoliating effects, but its primary function is to promote cell turnover and stimulate collagen production, making it more focused on anti-aging benefits than on exfoliation alone. Therefore, among the choices given, AHAs stand out as the primary ingredient designed specifically for exfoliating the skin in facial products.