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Head-to-head evidence comparison — which supplement is right for you?
Adapalene 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 Adapalene and Salicylic Acid (topical) have evidence — compare verdict strength side-by-side.
Topical use. Adapalene 0.1% (OTC) or 0.3% (prescription) gel/cream is applied as a thin layer to the whole affected area once daily, usually at night, starting every other day and building to nightly as tolerated. Full benefit takes ~8-12 weeks. There is no oral or systemic dose — it is not ingested. It is most effective combined with benzoyl peroxide. This library does not provide an ingestion protocol.
evening
Adapalene 0.1% gel/cream (OTC), applied nightly to the whole area
Topical OTC use. Leave-on and wash-off acne products contain 0.5-2% salicylic acid, applied to affected areas once or twice daily and built up as tolerated; professional peels (20-30%) are applied in-office. There is no oral or systemic dose in this context — it is not ingested (and large-area/high-concentration use can cause systemic salicylate absorption, so follow label limits). This library does not provide an ingestion protocol.
any
Leave-on or wash-off acne product (0.5-2% salicylic acid)
Throughout
8-12 weeks
Throughout
First weeks
Throughout
4-12 weeks
4-12 weeks
Throughout
A comparison of the efficacy and tolerability of adapalene 0.1% gel versus tretinoin 0.025% gel in patients with acne vulgaris: a meta-analysis of five randomized trials.
Br J Dermatol (1998) · Meta analysis · n=900
Meta-analysis of five randomized investigator-blind trials (900 patients) in mild-to-moderate acne
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
Pivotal 12-week double-blind RCT (n=517) of adapalene-BPO vs adapalene, BPO, or vehicle
Topical preparations for the treatment of mild-to-moderate acne vulgaris: systematic review and network meta-analysis.
Br J Dermatol (2021) · Systematic review
Systematic review and network meta-analysis of 40 trials (18,089 participants) of topical acne treatments
Comparison of alpha- and beta-hydroxy acid chemical peels in the treatment of mild to moderately severe facial acne vulgaris.
Dermatol Surg (2008) · Rct · n=20
Split-face, double-blind RCT (n=20) comparing 30% salicylic acid vs 30% glycolic acid peels, six treatments at 2-week intervals
Comparison of chloroxylenol 0.5% plus salicylic acid 2% cream and benzoyl peroxide 5% gel in the treatment of acne vulgaris: a randomized double-blind study.
Drugs Exp Clin Res (2003) · Rct · n=37
12-week double-blind RCT (n=37) comparing a 2% salicylic acid (plus chloroxylenol) cream vs benzoyl peroxide 5% gel twice daily
Comparative study of efficacy and safety of 45% mandelic acid versus 30% salicylic acid peels in mild-to-moderate acne vulgaris.
J Cosmet Dermatol (2020) · Rct · n=50
Randomized trial (n=50) of 30% salicylic acid vs 45% mandelic acid peels, six sessions over 12 weeks for mild-to-moderate acne
Adapalene has a higher evidence score (9/10 vs 5/10) and wins in 2 of 3 categories.
For clearer skin (acne), Adapalene has a higher relevance score (85 vs 75).
No known interactions between Adapalene and Salicylic Acid (topical) have been documented in our database. However, always consult a healthcare provider before combining supplements.