Treatments and supplements · Hyaluronic acid
Does hyaluronic acid really hydrate?
What we can tell you today: how thoroughly this has been studied.
Well studied
17 studies, including 2 that bring together the results of several trials in people.
5 Repeated evidence 2 studies
4 Large controlled trial 6 studies
3 Small study in people 9 studies
This says how thoroughly something has been studied — not whether it works for you. What each study actually found is in the study itself, and in the plain-language write-ups we are adding.
Appears under: Skin aging
The studies
- 5 Repeated evidence
The selection of hyaluronic acid when treating with the nasolabial fold: A meta-analysis.
2022 · Journal of cosmetic dermatology · 1,190 participants
- 5 Repeated evidence
Efficacy and Safety of Amino Acid-Enriched Hyaluronic Acid in Facial Rejuvenation: A Systematic Review and Meta-Analysis.
2026 · Journal of cosmetic dermatology · 11 participants
- 4 Large controlled trial
A hyaluronic acid-based micro-filler improves superficial wrinkles and skin quality: a randomized prospective controlled multicenter study.
2023 · The Journal of dermatological treatment · 146 participants
- 4 Large controlled trial
Prospective comparative clinical study: Efficacy evaluation of collagen combined with hyaluronic acid injections for tear trough deformity.
2024 · Journal of cosmetic dermatology · 2,023 participants
- 4 Large controlled trial
Efficacy and Safety of Two Resilient Hyaluronic Acid Fillers in the Treatment of Moderate-to-Severe Nasolabial Folds: A 64-Week, Prospective, Multicenter, Controlled, Randomized, Double-Blinded, and Within-Subject Study.
2021 · Dermatologic surgery : official publication for America · 174 participants
- 4 Large controlled trial
A randomized study showing improved skin quality and aesthetic appearance of dorsal hands after hyaluronic acid gel treatment in a Chinese population.
2021 · Journal of cosmetic dermatology · 100 participants
- 4 Large controlled trial
Safety and Effectiveness of a Crosslinked Hyaluronic Acid Filler in Korean Patients for the Correction of Nasolabial Folds: A Randomized, Patient- and Evaluator-Blinded, Paired Study.
2026 · Aesthetic surgery journal · 100 participants · manufacturer helped fund this
- 4 Large controlled trial
Improvement in nasolabial folds with a hyaluronic acid filler using a cohesive polydensified matrix technology: results from an 18-month open-label extension trial.
2010 · Dermatologic surgery : official publication for America · 118 participants
- 3 Small study in people
Comparison of the effects of polynucleotide and hyaluronic acid fillers on periocular rejuvenation: a randomized, double-blind, split-face trial.
2022 · The Journal of dermatological treatment · 27 participants
- 3 Small study in people
A Randomized, Evaluator-Blinded, Multicenter Study to Compare Injectable Poly-D,L-Lactic Acid vs Hyaluronic Acid for Nasolabial Fold Augmentation.
2024 · Aesthetic surgery journal
- 3 Small study in people
Clinical efficacy and safety of polynucleotides highly purified technology (PN-HPT®) and cross-linked hyaluronic acid for moderate to severe nasolabial folds: A prospective, randomized, exploratory study.
2023 · Journal of cosmetic dermatology · 20 participants
- 3 Small study in people
Hand Rejuvenation with Customizable Hybrid Fillers: Premixed Calcium Hydroxyapatite and Hyaluronic Acid.
2024 · Aesthetic plastic surgery
- 3 Small study in people
Dissolving microneedle with high molecular weight hyaluronic acid to improve skin wrinkles, dermal density and elasticity.
2021 · International journal of cosmetic science
- 3 Small study in people
High molecular weight hyaluronic acid vectorised with clay provides long-term hydration and reduces skin brightness.
2024 · Skin research and technology : official journal of Inte
- 3 Small study in people
Microinjections with hyaluronic acid in combination with glycerol: How do they influence biophysical viscoelastic skin properties?
2022 · Skin research and technology : official journal of Inte · manufacturer helped fund this
- 3 Small study in people
Efficacy of bioactive peptides loaded on hyaluronic acid microneedle patches: A monocentric clinical study.
2020 · Journal of cosmetic dermatology · manufacturer helped fund this
- 3 Small study in people
A randomized, split-face, histomorphologic study comparing a volumetric calcium hydroxylapatite and a hyaluronic acid-based dermal filler.
2015 · Journal of drugs in dermatology : JDD