Hyaluronic acid (HA) is a glycosaminoglycan — a type of molecule naturally produced by your body. It's found in highest concentrations in the skin, connective tissue, and eyes. Its superpower: each HA molecule can hold up to 1,000 times its weight in water, making it one of the most powerful natural hydrators known to science.
Why Is It So Important for Skin?
HA acts like a moisture reservoir in the dermis. When your skin is rich in hyaluronic acid, it looks plump, dewy, and youthful. As HA levels naturally decline with age (losing roughly 50% by age 50), skin becomes dryer, thinner, and more prone to wrinkles.
HA in Professional Treatments
- HydraFacial: Infuses HA deep into the skin during the hydration step for immediate plumpness
- Topical serums: Applied after microneedling to penetrate through the micro-channels for enhanced absorption
- Dermal fillers (e.g., Juvederm, Restylane): Injectable HA that restores volume to cheeks, lips, and under-eyes
💡 Pro TipNot all HA products are created equal. Low-molecular-weight HA penetrates deeper but can cause irritation in sensitive skin. High-molecular-weight HA sits on the surface, providing a hydrating barrier. The best formulations use multiple weights.