Ingredient Encyclopedia

Hyaluronic Acid (HA) is a naturally occurring molecule in the skin that binds and retains water, helping keep skin plump, smooth, and hydrated. It can improve skin elasticity, reduce fine lines, and enhance overall skin comfort (PubMed). What is Hyaluronic Acid? HA is a glycosaminoglycan found in connective tissue. Topical HA attracts water to the skin surface, supporting hydration and barrier function. Its soothing properties make it suitable for nearly all skin types (DermNet NZ). Key Benefits Immediate Hydration – Attracts and holds water, reducing dryness (PubMed) Plumper, Smoother Skin – Softens fine lines and wrinkles (PMC) Enhances Tolerance of Other Actives – Reduces irritation from retinoids and acids Supports Skin Barrier – Helps maintain moisture and resilience (DermNet NZ) Universal Compatibility – Suitable for sensitive, dry, or acne-prone skin Who Should Use It? Dry or dehydrated skin Sensitive or redness-prone skin Anyone using retinoids or acids who needs comfort and barrier support Who Should Avoid It? Rare stickiness with very thick formulas Ensure HA is sealed with a moisturizer in very dry climates How to Use It in a Routine Apply to slightly damp skin to enhance absorption (PubMed) Seal with a cream or oil to prevent water loss Safe to use AM and PM, compatible with most actives including Vitamin C, Niacinamide, and Retinol Side Effects Generally well-tolerated; very rare irritation Possible slight stickiness if over-applied Verdict Hyaluronic Acid is a gentle, universal hydrator. Works best when applied to damp skin and sealed in with a moisturizer for long-lasting hydration. FAQs Is Hyaluronic Acid safe for sensitive skin?Yes, HA is generally well-tolerated and considered gentle. Patch testing is recommended if your skin is extremely sensitive (DermNet NZ). Can I use HA with retinoids or acids?Yes. HA helps buffer potential irritation from retinoids, AHAs, or BHAs, making your routine more comfortable (PMC). Should I apply HA to dry or damp skin?Apply to slightly damp skin to enhance water-binding properties, then seal with a moisturizer (PubMed). Can HA make skin greasy?HA itself is non-oily. Slight stickiness may occur if layered with heavy creams or oils. How often can I use Hyaluronic Acid?HA is safe for daily use, morning and night, and can be layered with most skincare products (PubMed). Does HA reduce wrinkles?HA mainly hydrates and plumps skin, reducing the appearance of fine lines. Maintaining hydration long-term supports skin resilience (PMC). What is the difference between low- and high-molecular-weight HA?Low-molecular-weight HA penetrates deeper to hydrate and improve elasticity, while high-molecular-weight HA sits on the surface for immediate plumping and barrier support (PubMed). Can I mix HA with Vitamin C or Niacinamide?Yes, HA pairs well with most actives, enhancing comfort without interfering with their effects (DermNet NZ). References Bukhari SNA, et al. "Hyaluronic Acid: A key molecule in skin aging." PubMed, 2009. DermNet NZ – Hyaluronic Acid in Skincare Baumann L. "Cosmeceuticals: Topical Hyaluronic Acid and Skin Hydration." PMC, 2017. Related Guides Retinol Guide – Layering and Benefits Niacinamide – Benefits and Uses Hyaluronic Acid vs Glycerin – Which Hydrator Works Better? 👉 Looking for a beginner-friendly hydrator? Try our Hyaluronic Serum for Clear Skin, formulated with multi-weight hyaluronic acid for immediate and lasting hydration.