Hyaluronic acid, ranked on what actually penetrates.
Hyaluronic acid is the most-marketed humectant in skincare — but molecular weight (single vs multi-MW) and concentration make a 10× difference in hydration depth and skin-feel. This page ranks 11 popular HA products on hydration score, clinical evidence, and price per ml.
Last updated: August 23, 2026 · Sources: Papakonstantinou 2014, Bayer 2018, Bukhari 2018 RCT, Essendoubi 2016 review
At a glance
Best budget multi-MW
The Ordinary Hyaluronic Acid 2% + B5
~$8.50 USD. Multi-molecular-weight HA + vitamin B5. The benchmark budget HA serum in both AU and TH.
Most evidence per dollar
CeraVe Hydrating Hyaluronic Acid Serum
~$20 USD. Multi-MW HA + ceramide complex + B5. Barrier-friendly hydration recommended by dermatologists in AU and TH.
Best for oily skin
Neutrogena Hydro Boost Water Gel
~$18 USD. Lightweight gel-cream with high-MW HA. Oil-free, mattifying — the cult drugstore HA for oily and combination skin.
Product comparison
Compare 11 popular hyaluronic acid products on molecular weight, format, hydration score, and price per ml. Hydration 5/5 = multi-MW stack with penetration + occlusion. Evidence 5/5 = strongest published clinical trial base.
Hydration 1/5 = single low-MW HA (surface humectant only), 5/5 = multi-MW stack with penetration + occlusion. Evidence score is the strength of the published clinical trial base (5/5 = multiple RCTs in dermatology journals, 1/5 = in-vitro only).
The 6 hyaluronic acid formats explained
1
Multi-molecular-weight HA Best standard
Hydration: 5/5 · Evidence: 5/5
The modern formulation standard. Combines low-MW HA (penetration into upper stratum corneum), medium-MW HA (surface water retention), and high-MW HA (occlusive surface film). Multi-MW HA is the most-cited HA format in dermatology literature since 2018 (Bayer 2018 showed multi-MW > single-MW for skin hydration and TEWL). Found in The Ordinary HA 2% + B5, CeraVe, La Roche-Posay Hyalu B5, and Paula's Choice Booster.
Best for: everyone except the most oily skin types. The default HA format for serious skincare routines.
2
Low-MW HA (<50 kDa)
Hydration: 2/5 · Evidence: 3/5
Small enough to penetrate the upper layers of the stratum corneum. Provides deeper hydration than high-MW HA but lacks surface smoothing. Often combined with other HA molecular weights in multi-MW stacks. Essendoubi 2016 showed low-MW HA penetrates the epidermis; high-MW HA does not.
Best for: layering under heavier products, when deeper hydration is the goal.
3
Medium-MW HA (50–500 kDa)
Hydration: 3/5 · Evidence: 3/5
Sits primarily on the skin surface, drawing water in from the environment and holding it in the upper stratum corneum. The most common HA weight in mass-market products. Provides immediate plumping but minimal long-term barrier effect.
Best for: daily hydration under moisturizer, combination skin.
4
High-MW HA (>500 kDa)
Hydration: 2/5 · Evidence: 2/5
Too large to penetrate the skin. Forms a surface film that smooths and provides immediate plumping. Best for dry or mature skin that needs a topical occlusive effect. The Neutrogena Hydro Boost line uses high-MW HA.
Best for: dry/mature skin, post-procedure calming, when an immediate smoothing effect is desired.
5
Hydrolyzed HA / nano-HA
Hydration: 3/5 · Evidence: 3/5
Chemically broken-down HA fragments that penetrate more easily than native HA. Often used in Asian (K-beauty, J-beauty) skincare. The Ordinary's Marine Hyaluronics uses hydrolyzed HA combined with marine-derived glycoproteins.
Best for: lightweight hydration, oily or combination skin.
6
Sodium hyaluronate (mixed)
Hydration: 3/5 · Evidence: 4/5
The salt form of HA, slightly smaller and more stable than native HA. Used in most mass-market products because it is cheaper to produce and more stable in solution. Effective at surface hydration; less evidence for penetration than hydrolyzed forms. Olay Regenerist and many Neutrogena products use sodium hyaluronate.
Best for: daily hydration, layering with actives (more stable than native HA).
How to layer hyaluronic acid (and why most people get it wrong)
HA is a humectant — it draws water TO the skin. If there's no water available, it draws water FROM the deeper layers of your skin, which dehydrates you over time. The "HA makes my skin drier" complaint is almost always this mistake. Here's how to layer it correctly:
Apply to damp skin, not dry skin. The #1 HA mistake. After cleansing, leave skin damp. Apply HA serum directly onto damp skin — it pulls the surface water into the stratum corneum. On dry skin, HA pulls water from deeper layers.
Use within 60 seconds of cleansing. The damp window is short. Pat-dry excess water, but do not let skin air-dry completely before applying HA.
Layer HA BEFORE moisturizer. HA is a humectant, not an occlusive. It draws water in but cannot prevent evaporation on its own. Always seal with a moisturizer (ceramide-based preferred) to lock in hydration.
Use in humid climates, not dry climates (without sealing). In Bangkok, Singapore, or coastal AU, HA on damp skin works beautifully. In air-conditioned offices or cold dry winters, HA needs heavy sealing or it can pull water OUT of the skin.
Pair with niacinamide for barrier support. Niacinamide (vitamin B3) + HA is a clinically-tested combo. Niacinamide reduces TEWL (transepidermal water loss) so HA-trapped water stays in the skin. The Ordinary HA 2% + B5 uses this combo.
HA pairs with most actives — gentle enough for retinol nights. Unlike AHAs/BHA, HA doesn't exfoliate. Use it on the same nights as retinol to buffer irritation and support the skin barrier during the retinization period.
Skip HA if you live in very dry climates without humidifier. In arid climates (desert, high-altitude, winter heating), HA without sealing can worsen dehydration. Switch to occlusive-rich formulas (ceramide creams, squalane).
Top picks by use case
Best budget multi-MW
The Ordinary Hyaluronic Acid 2% + B5
~$8.50 USD, 30ml. Multi-molecular-weight HA + vitamin B5. The benchmark budget HA serum globally. Read the full HA guide →
Best barrier-friendly
CeraVe Hydrating Hyaluronic Acid Serum
~$20 USD. Multi-MW HA + ceramide complex + B5. The dermatologist-recommended barrier-friendly HA. Sold in TH Watsons.
Best for oily / combination skin
Neutrogena Hydro Boost Water Gel
~$18 USD. Lightweight oil-free gel-cream with high-MW HA. The cult drugstore HA — mattifying, non-comedogenic, suitable for acne-prone skin.
Best dermatologist-grade
La Roche-Posay Hyalu B5 Serum
~$45 USD. French pharmacy dual-MW HA + B5 + madecassoside. The right choice if you want dermatologist validation. Sold in TH Watsons.
Best premium / iHerb
Paula's Choice Hyaluronic Acid Booster
~$42 USD. Multi-weight HA + ceramides + panthenol. Mix with moisturizer or use alone. Sold globally via own site + iHerb.
Best vegan clean-beauty premium
Drunk Elephant B-Hydra Intensive Hydration Serum
~$54 USD. Multi-weight HA + 5% niacinamide. Vegan, clean-beauty formulation. Sold at Sephora AU and iHerb for TH shipping.
Best Thailand-available premium
Medik8 Hydr8 B5
~$75 USD. Multi-weight HA + B5 + biosaccharide gum-1 for sustained release. UK professional-grade. Available at Sephora TH, Lazada.
~$32 USD. Medium-MW HA + Aquagenium™ complex. French dermo-cosmetic for dehydrated sensitive skin. Sold at TH Watsons.
Best Thailand-local clinical brand
INGU Green Tea Biome Balance Essence
THB 770 (~$22 USD). Thai clinical brand (อิงกุ) — HA + green tea ferment in essence format. THB-priced for Thai consumers. Supports skin microbiome alongside hydration.
Side effects & warnings
Hyaluronic acid is one of the safest skincare actives — it's a molecule your body naturally produces. Side effects are rare and almost always related to the formulation, not the HA itself.
Common (mostly application-related)
Skin feels tighter or drier after application — usually means HA is pulling water FROM skin (apply on damp skin + seal with moisturizer)
Mild stickiness if too much is applied — use 2–3 drops for the whole face
Pilling under sunscreen or makeup — wait 60 seconds between layers
Rare contact dermatitis to preservatives or vehicle ingredients (not HA itself)
Stop use and see a dermatologist if
Persistent redness, itching, or swelling after application (true allergy)
Hives or rash that develops within hours of use
Worsening of eczema or rosacea — switch to a single-ingredient HA with fewer additives
Active skin infection or open wounds on the application area
Recent laser, microneedling, or chemical peel (wait 24–48 hours before resuming HA)
Drug interactions: None known for topical HA. HA does not interact with oral medications. If you are using prescription topical treatments (tretinoin, azelaic acid), HA can be layered on the same night as a buffer.
References & sources
Papakonstantinou E, et al. (2014). Hyaluronic acid: A key molecule in skin aging. Dermato-Endocrinology 4(3):253-258. PMID: 23467248
Bayer IS (2018). Hyaluronic acid: A review of the literature. Journal of Drugs in Dermatology (multi-MW HA clinical review).
Bukhari SNA, et al. (2018). Hyaluronic acid, a promising skin rejuvenating biomedicine: A review of recent updates and pre-clinical and clinical investigations. International Journal of Biological Macromolecules 120:1682-1695. PMID: 30287361
Essendoubi M, et al. (2016). Penetration of low molecular weight hyaluronic acid. Skin Pharmacology and Physiology (HA penetration depth review).
American Academy of Dermatology — Hyaluronic acid patient guidance. aad.org
Examine.com — Hyaluronic acid (topical) research summary. examine.com
The Ordinary, CeraVe, La Roche-Posay, Neutrogena, Olay, Paula's Choice, Bioderma TH, Medik8, Drunk Elephant, INGU — product pages and price snapshots cited per row above (date column).
Trusted brands we rate
These 10 brands are featured on every vitfacts.com comparison page. We track them
for ingredient transparency, third-party testing, and Thailand availability.
A clinical-active cult brand built around single-molecule formulas at price points that disrupted the skincare industry. Sold at Sephora, Chemist Warehouse, and most Thai beauty retailers.
A dermatologist-developed US brand built around ceramides + MVE controlled-release technology. Sold at Chemist Warehouse, Watsons, Boots, and most major pharmacies worldwide.
A 70-year-old P&G mass-market skincare brand with clinical retinol offerings in the Regenerist line. Widely stocked at supermarkets, Watsons, Boots, and Chemist Warehouse.
A dermatologist-recommended US brand with a deep retinol catalog (Rapid Wrinkle Repair, Stubborn Texture). One of the most-searched retinol brands on both AU and TH retail sites.
A French pharmacy-grade dermocosmetics brand endorsed by dermatologists worldwide. Their Retinol B3 serum and Redermic lines are bestsellers in both Australian and Thai pharmacies.
A research-driven US skincare brand founded by chemist Paula Begoun. The Clinical 1% Retinol Treatment is one of the most-cited retinol products in dermatology literature. Sold via own site, iHerb, and Sephora.
A UK professional-grade skincare brand built around CSA philosophy (Vitamin C + Sunscreen + Vitamin A). Their Crystal Retinal series is one of the most stable retinaldehyde products on the market.
A French dermo-cosmetic brand under the NAOS group, widely sold at Watsons, Boots, and Thai independent pharmacies. Recently expanded retinol line with the Retinol+C10 serum.
A US premium "biocompatible" skincare brand owned by Shiseido. The A-Passioni 1% Retinol Cream is widely considered the gold standard in the premium retinol segment. Sold at Sephora, Mecca, and iHerb.
Since Thailand (founded year unverified — about/story page does not state a year)
MID
A Thai clinical-skincare brand (อิงกุ) built around ingredient transparency and research-led formulations. Operates two product lines: topical skincare (Green Tea Biome Balance cleansers/creams, Green Tea Retinol Serum Shot, Vitamin C AOX Glowing Serum, broad-spectrum sunscreens) and an oral INU range (astadaily / astanext Astaxanthin + Vitamin E antioxidant supplements).
Why these 10? See the VitFacts editorial policy page (forthcoming) for the criteria — minimum
10 years of documented safety record, public certificate-of-analysis policy, and verifiable
Thailand distribution.
