In which layer of the skin does hyaluronic acid help retain fluid?

Hyaluronic acid is primarily found within the dermis layer of the skin, where it plays a crucial role in maintaining hydration and elasticity. This naturally occurring substance has the remarkable ability to attract and bind water molecules, helping to retain moisture in the skin. By doing so, it supports the skin's structure and diminishes the appearance of fine lines and wrinkles, contributing to a plump, youthful appearance.

In contrast, the epidermis is the outermost layer of the skin, which lacks blood vessels and relies primarily on the dermis for nutrient and moisture supply. The hypodermis, or subcutaneous layer, is primarily composed of fat and connective tissue, serving as insulation and cushioning for the body. While all these layers have specific functions, hyaluronic acid's effectiveness in fluid retention is most significant in the dermis, where it directly impacts skin health and appearance.