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Head-to-head evidence comparison — which supplement is right for you?
Benzoyl Peroxide and Retinol are closely matched across evidence, studies, and safety.
Verdict
Mostly mechanism / observational
Top outcomes
Verdict
Mostly mechanism / observational
Top outcomes
Shared outcomes (1)
Outcomes where both Benzoyl Peroxide and Retinol 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
Topical cosmetic only. OTC retinol is formulated roughly 0.1-1% in leave-on serums or creams and applied to clean, dry facial skin at night, starting 2-3 nights per week and building to nightly as tolerated. There is no oral, injectable, or systemic dose — this is not ingested. Higher concentrations work somewhat better but irritate more; pair with a moisturizer and a morning sunscreen. This library does not provide an ingestion protocol.
evening
Leave-on topical serum or cream (0.1-1% retinol)
Throughout
4-12 weeks
Throughout
First weeks
Throughout
8-24 weeks
8-24 weeks
Throughout
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
Improvement of naturally aged skin with vitamin A (retinol).
Arch Dermatol (2007) · Rct · n=36
Randomized, double-blind, vehicle-controlled left/right-arm study: 0.4% retinol lotion vs vehicle applied up to 3x/week for 24 weeks in 36 elderly subjects (mean age 87)
A stabilized 0.1% retinol facial moisturizer improves the appearance of photodamaged skin in an eight-week, double-blind, vehicle-controlled study.
J Drugs Dermatol (2009) · Rct · n=64
Eight-week, double-blind, split-face, randomized study: stabilized 0.1% retinol moisturizer (36 subjects) vs vehicle (28 subjects) in women with moderate facial photodamage
Comparative efficacy of topical interventions for facial photoaging: a network meta-analysis.
Sci Rep (2025) · Meta analysis
Systematic review and Bayesian network meta-analysis of 23 RCTs (3905 participants) of topical anti-photoaging agents
Both Benzoyl Peroxide and Retinol are closely matched — the best choice depends on your specific health goals.
No known interactions between Benzoyl Peroxide and Retinol have been documented in our database. However, always consult a healthcare provider before combining supplements.