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Head-to-head evidence comparison — which supplement is right for you?
Benzoyl Peroxide wins 1 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 Tea Tree Oil (topical) 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. Acne trials used a 5% tea tree oil gel applied to affected areas (typically twice daily). Avoid undiluted (100%) application, which is more irritating and sensitizing. Patch-test first, and use fresh, properly stored product (oxidized oil raises allergy risk). There is no oral or systemic dose — it is not ingested (and tea tree oil is toxic if swallowed). This library does not provide an ingestion protocol.
any
5% tea tree oil gel (the trial-tested strength)
Throughout
4-12 weeks
Throughout
First weeks
Throughout
8-12 weeks
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
A comparative study of tea-tree oil versus benzoylperoxide in the treatment of acne.
Med J Aust (1990) · Rct · n=124
Single-blind RCT in 124 patients comparing 5% tea tree oil gel with 5% benzoyl peroxide lotion for mild-to-moderate acne
The efficacy of 5% topical tea tree oil gel in mild to moderate acne vulgaris: a randomized, double-blind placebo-controlled study.
Indian J Dermatol Venereol Leprol (2007) · Rct · n=60
Randomized double-blind placebo-controlled trial (n=60) of 5% tea tree oil gel vs placebo over 45 days
Tea tree oil gel for mild to moderate acne; a 12 week uncontrolled, open-label phase II pilot study.
Australas J Dermatol (2017) · Pilot · n=18
Open-label, uncontrolled 12-week phase II pilot of a tea tree oil gel and face wash applied twice daily (n=18)
Benzoyl Peroxide has a higher evidence score (9/10 vs 5/10) and wins in 1 of 3 categories.
For clearer skin (acne), Benzoyl Peroxide has a higher relevance score (85 vs 62).
No known interactions between Benzoyl Peroxide and Tea Tree Oil (topical) have been documented in our database. However, always consult a healthcare provider before combining supplements.