Hyaluronic Acid: What It Is and Why Your Skin Loves It

Hyaluronic acid is one of the most widely used ingredients in modern skincare, and one of the better supported by clinical evidence. It is an important component of the extracellular matrix in skin, where it binds water and supports volume and elasticity. Skin levels begin to decline from around the age of 25 [1].

What the research shows

A 2022 review that moved from the published literature through to clinical evidence found that topical hyaluronic acid improves hydration, skin quality and the appearance of skin ageing signs, and reported clinical studies of hyaluronic acid products across dermatological, aesthetic and post-procedure settings [1].

Worth being clear about what it does and does not do. Hyaluronic acid improves hydration and the appearance of dehydration lines. It is not a collagen-building active in the way retinoids and vitamin C are, so it works best alongside them rather than instead of them [2][3]. Notably, in a systematic review of topical vitamin C trials, hydration improved equally in vitamin C and placebo groups, which is a useful reminder that different actives do different jobs [3].

Benefits for the skin

Hyaluronic acid improves hydration, softens fine lines caused by dehydration, supports barrier function and improves overall smoothness [1]. It is lightweight and non-comedogenic, so it suits dry, oily, acne-prone and sensitive skin alike.

It is also widely used to support post-treatment recovery by helping restore moisture balance, which is why it appears in many professional aftercare protocols [1].

Molecular weight matters

Not all hyaluronic acid behaves the same way. Formulations often combine several molecular weights: higher molecular weight forms sit on the surface to reduce water loss and give an immediate plumping effect, while lower molecular weight forms penetrate the epidermis for hydration at depth [1].

How to use it correctly

Step 1: Cleanse. Apply to freshly cleansed skin so nothing blocks contact.

Step 2: Apply to damp skin. Apply to slightly damp skin, not bone dry, so it binds available moisture. Use 1 to 2 pumps pressed gently into face, neck and décolletage.

Step 3: Seal with moisturiser. This step matters. A humectant works best with an occlusive layer over it to hold the moisture in place [1].

Step 4: Morning and night. In the morning, finish with sunscreen, since UV exposure is the main driver of visible skin ageing [2]. At night, layer under your night cream.

Common mistakes

• Applying to completely dry skin
• Skipping moisturiser afterwards
• Using too much product
• Relying on hyaluronic acid alone without barrier support or other actives

Who can use it

Hyaluronic acid suits all skin types, including sensitive and acne-prone skin, and is well tolerated in the clinical literature [1]. It is also a sensible choice after professional treatments to support barrier recovery.

At Oceania Wellness we recommend hyaluronic acid as part of a personalised routine built around your skin type and goals. Book a consultation if you would like help putting one together.

References

1. Bravo, B., Correia, P., Gonçalves, J. E., Sant'Anna, B., & Kerob, D. (2022). Benefits of topical hyaluronic acid for skin quality and signs of skin aging: From literature review to clinical evidence. Dermatologic Therapy, 35(12), e15903. https://doi.org/10.1111/dth.15903
2. Quan, T. (2023). Human skin aging and the anti-aging properties of retinol. Biomolecules, 13(11), 1614. https://doi.org/10.3390/biom13111614
3. Correia, G., & Magina, S. (2023). Efficacy of topical vitamin C in melasma and photoaging: A systematic review. Journal of Cosmetic Dermatology, 22(7), 1938–1945. https://doi.org/10.1111/jocd.15748
4. Crespi, O., Rosset, F., Pala, V., Sarda, C., Accorinti, M., Quaglino, P., & Ribero, S. (2025). Cosmeceuticals for anti-aging: Mechanisms, clinical evidence, and regulatory insights—A comprehensive review. Cosmetics, 12(5), 209. https://doi.org/10.3390/cosmetics12050209
5. Boo, Y. C. (2022). Ascorbic acid (vitamin C) as a cosmeceutical to increase dermal collagen for skin antiaging purposes: Emerging combination therapies. Antioxidants, 11(9), 1663. https://doi.org/10.3390/antiox11091663

This article is general information about skincare ingredients and is not personal medical advice. If you have a specific skin concern, please speak with your GP, dermatologist or one of our therapists.