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Head-to-head evidence comparison — which supplement is right for you?
Hyaluronic Acid vs Urea: they're closely matched on evidence (5.5 vs 6/10); they're alternatives for skin hydration & glow — the best pick depends on your goals. Take the 60-second quiz for a pick tailored to your goals.
Hyaluronic Acid and Urea are closely matched across evidence, studies, and safety.
Verdict
Mostly mechanism / observational
1 of 1 studies with measurable effects showed benefit.
Top outcomes
Verdict
Mostly mechanism / observational
Top outcomes
Shared outcomes (1)
Outcomes where both Hyaluronic Acid and Urea have evidence — compare verdict strength side-by-side.
120-240mg daily
With food, Once daily
Low molecular weight hyaluronic acid capsules
Pick the concentration for the job: 5-10% for daily moisturising of dry skin, 20-25% for thickened skin and callus, 30-40% for nail softening or scale removal. Apply once or twice daily.
any
Urea 10% cream for daily dry skin
4-8 weeks
8-12 weeks
8-12 weeks
immediate
2-4 weeks
1-2 weeks
4 weeks
Efficacy of fractional CO(2) laser therapy combined with hyaluronic acid dressing for treating facial atrophic acne scars: a systematic review and meta-analysis of randomized controlled trials
Lasers in medical science (2023) · Meta analysis · n=623
In addition, fractional CO2 laser combined with HA dressing therapy had a lower incidence of hyperpigmentation than fractional CO2 laser alone (RR=0.37, 95% CI [0.23, 0.61], P<0.0001).
Comparative effectiveness of pharmacologic interventions for knee osteoarthritis: a systematic review and network meta-analysis
Annals of internal medicine (2015) · Meta analysis · n=33243
This method allowed comparison of common treatments of knee OA according to their relative efficacy.
Long-term effectiveness of intra-articular injectables in patients with knee osteoarthritis: a systematic review and Bayesian network meta-analysis
Journal of orthopaedic surgery and research (2025) · Meta analysis · n=5089
These findings emphasize the sustained efficacy of PRP, particularly when combined with HA, in providing superior long-term pain relief and functional improvement in knee OA compared to other intra-articular injectables, highlighting its potential as a preferred treatment modality.
Effect of Urea Cream on Hand-Foot Syndrome in Patients Receiving Chemotherapy: A Meta-analysis
Cancer Nurs (2022) · Meta analysis · n=1387
Seven trials, 1387 patients, PROSPERO-registered. Both risk ratios below come from the prophylactic subgroup, not the whole pool.
Randomized controlled trial on the efficacy of topical urea-based cream in preventing capecitabine-associated hand-foot syndrome
BMC Cancer (2025) · Rct · n=216
THE COUNTER-EVIDENCE: a 216-patient randomised trial in which every prespecified endpoint was null.
Emollients and moisturisers for eczema
Cochrane Database Syst Rev (2017) · Meta analysis · n=6603
The Cochrane review that sets the context urea has to be judged in: 77 studies, 6603 participants.
Based on limited meta-analysis (n=12) showing improved skin hydration. Oral bioavailability is questionable and most dermatological studies used topical/injectable forms. Low molecular weight forms may have better absorption.
AI-estimated from published studies. Interpret as directional guidance.
Both Hyaluronic Acid and Urea are closely matched — the best choice depends on your specific health goals.
For skin hydration & glow, Urea has a higher relevance score (82 vs 70).
No known interactions between Hyaluronic Acid and Urea have been documented in our database. However, always consult a healthcare provider before combining supplements.
The right pick depends on your goals. Answer a few quick questions for a personalised recommendation — or dig into the full evidence on each.