California Cosmetology Practice Exam 2026 - Free Cosmetology Practice Questions and Study Guide

Hyaluronic acid is a powerful ingredient known for its exceptional ability to hydrate the skin. It is a naturally occurring substance in the body that can hold up to 1,000 times its weight in water, making it an effective humectant. This means it draws moisture from the environment into the skin, helping to maintain optimal hydration levels.

By incorporating hyaluronic acid into skincare products, it can plump the skin, reduce the appearance of fine lines and wrinkles, and provide a smoother, more youthful complexion. It is particularly beneficial for individuals with dry or dehydrated skin, as it helps to restore moisture balance and improve overall skin texture.

The other ingredients mentioned have different primary functions, such as retinol, which is primarily used for anti-aging effects and improving skin texture by increasing cell turnover. Salicylic acid is known for its exfoliating properties and is commonly used to treat acne due to its ability to penetrate pores and reduce inflammation. Vitamin C serves primarily as an antioxidant that brightens the skin and helps with the prevention of signs of aging, but it does not directly function to hydrate.