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Head-to-head evidence comparison — which supplement is right for you?
Benzoyl Peroxide vs Urea: Benzoyl Peroxide has the stronger overall evidence (9 vs 6/10); the best pick depends on your goals. Take the 60-second quiz for a pick tailored to your goals.
Benzoyl Peroxide wins 2 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Mostly mechanism / observational
Top outcomes
Verdict
Mostly mechanism / observational
Top outcomes
Shared outcomes (1)
Outcomes where both Benzoyl Peroxide and Urea have evidence — compare verdict strength side-by-side.
Topical OTC use. Benzoyl peroxide is used at 2.5-10% in gels, creams, and washes, applied to acne-prone areas once or twice daily; lower strengths (2.5-5%) are usually as effective as 10% with less irritation. There is no oral or systemic dose — it is not ingested. It is often combined with a retinoid (e.g. adapalene) for greater effect. This library does not provide an ingestion protocol.
any
Leave-on gel/cream (2.5-5%) or a fixed combination with a retinoid
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
Throughout
4-12 weeks
Throughout
First weeks
immediate
2-4 weeks
1-2 weeks
4 weeks
Topical benzoyl peroxide for acne.
Cochrane Database Syst Rev (2020) · Systematic review
Pooled 120 RCTs (29,592 participants); BPO more effective than placebo/no treatment for participant-reported improvement (RR 1.27, 95% CI 1.12 to 1.45)
Efficacy of topical treatments for mild-to-moderate acne: A systematic review and meta-analysis of randomized control trials.
J Eur Acad Dermatol Venereol (2025) · Meta analysis
Network meta-analysis of 35 RCTs (33,472 participants) comparing nine topical acne agents
Adapalene-benzoyl peroxide, a fixed-dose combination for the treatment of acne vulgaris: results of a multicenter, randomized double-blind, controlled study.
J Am Acad Dermatol (2007) · Rct · n=517
517 subjects randomized double-blind to adapalene-BPO, adapalene, BPO, or vehicle for 12 weeks
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.
Benzoyl Peroxide has a higher evidence score (9/10 vs 6/10) and wins in 2 of 3 categories.
No known interactions between Benzoyl Peroxide 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.