Products
Hyaluronic Acid (topical)
Sodium hyaluronate / hyaluronic acid
Hydration, plumping, and barrier support
Topical hyaluronic acid is a humectant with no chromophore activity. It is universally tolerated regardless of skin tone or type.
Topical hyaluronic acid serums are humectants, meaning they draw water into your skin to keep it plumped and hydrated. They do not add moisture themselves; they attract and hold it. They are one of the most widely used skincare ingredients and are exceptionally safe and well tolerated, but the dramatic hydration effect some users expect depends heavily on the environment (dry climates can draw moisture out rather than in) and the rest of your routine.
Sourced via EWG Skin Deep, one of the scientific databases used by the Yuka app to evaluate cosmetic ingredient safety.
Mega Moisture Magnet Hyaluronic Acid Serum
LATHER
Hyaluronic Acid 2% + B5
The Ordinary
Hydrating Hyaluronic Acid Serum
CeraVe
Topical hyaluronic acid (HA) is a glycosaminoglycan humectant that can hold up to 1,000 times its weight in water, drawing moisture from the dermis and environment into the stratum corneum. Molecular weight significantly affects behaviour: high-molecular-weight HA (above 1,000 kDa) forms a film on the skin surface with good occlusive humectant effects but minimal dermal penetration; low-molecular-weight HA (below 50 kDa) and oligomeric HA penetrate more deeply and may trigger CD44 receptor-mediated cellular responses, though this is not uniformly beneficial and some research shows pro-inflammatory effects with very low MW fragments. Multi-weight HA formulations attempt to address multiple depths simultaneously, but clinical differentiation between MW grades in OTC products is incompletely established.
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Topical HA significantly increases skin hydration as measured by corneometry at 2, 4, and 8 hours post-application versus water-only control in multiple studies.
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High-molecular-weight HA forms an effective moisture-retention film on the skin surface and reduces TEWL in combination with occlusives.
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Topical HA is consistently rated as one of the least allergenic and least irritating cosmetic actives across large consumer safety databases.
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Whether low-molecular-weight HA fragments in topical products achieve meaningful dermal penetration in intact skin and whether this translates to collagen synthesis benefits.
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Whether very low MW HA oligomers (below 10 kDa) trigger pro-inflammatory CD44 signalling in skin, which could theoretically worsen inflammatory conditions.
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Clinical differentiation between single-weight and multi-weight HA formulations in head-to-head RCTs.
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Whether topical HA provides any sustained benefit to wrinkle depth beyond transient plumping from hydration.
Efficacy of a topical hyaluronic acid serum in subjects with mild-to-moderate dehydrated skin
Pavicic et al. · Journal of Drugs in Dermatology · 2011
A 60-day double-blind RCT (n=76) using a topical serum with five molecular-weight fractions of HA showed a 40% improvement in skin hydration, 10% reduction in wrinkle depth assessed by Visioscan profilometry, and significant improvements in elasticity vs. placebo at 60 days.
PubMed ↗ PMID 21779376| Brand | Manufacturer | What differentiates it | Approval | Pricing |
|---|---|---|---|---|
| The Ordinary Hyaluronic Acid 2% + B5 | DECIEM | Multi-molecular weight HA with pro-vitamin B5; one of the most affordable HA serums available | OTC | $8 / 30 ml |
| Neutrogena Hydro Boost Water Gel | Johnson & Johnson | Gel-cream format with petrolatum base to seal in HA; widely available drugstore option for daily hydration | OTC | $20 / 50 ml |
| SkinCeuticals Hyaluronic Acid Intensifier | SkinCeuticals (L'Oreal) | Combines HA with proxylane, licorice root, and purple rice extract; positions as a collagen-supporting formulation | OTC | $112 / 30 ml |
| Vichy Mineral 89 Daily Skin Booster | L'Oreal | 89% mineralising water with hyaluronic acid; lightweight daily serum with strong European dermatologist recommendation history | OTC | $35 / 50 ml |
| La Roche-Posay Hyalu B5 Serum | L'Oreal | Combines HA with vitamin B5 and madecassoside; formulated for sensitive and compromised skin barriers | OTC | $42 / 30 ml |
Should You Try This?
Probably okay to try
Clinic checklist
Universal
- Check the ingredient is listed in the first half of the INCI list to confirm meaningful concentration.
- Look for airtight or opaque packaging -- light and air degrade active ingredients.
- Check the expiry date before purchasing; actives degrade after opening.
- Patch test on your inner arm for 24 hours before applying to your face.
- Introduce one new active at a time so you can identify any reaction.
- Store opened products away from direct sunlight and humidity.
Procedure-specific
- Apply HA serum to slightly damp skin (immediately after cleansing or toning) to maximise water-binding from the skin surface.
- Always follow HA with a moisturiser or occlusive in dry or air-conditioned environments to prevent the serum drawing moisture out through the epidermis.
- Multi-molecular weight formulations (listing both high and low MW HA or sodium hyaluronate and hydrolysed hyaluronic acid) are preferable for broader coverage.
- If your skin feels tight or more dehydrated after using HA, you likely need a stronger occlusive layer on top, not a different HA product.
Educational content only. This page summarises published clinical research and is not medical advice. Consult a qualified healthcare provider before making decisions about your care.