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Head-to-head evidence comparison — which supplement is right for you?
Adapalene vs Mandelic Acid (topical): Adapalene has the stronger overall evidence (9 vs 5/10); they're alternatives for clearer skin (acne) — the best pick depends on your goals. Take the 60-second quiz for a pick tailored to your goals.
Adapalene wins 2 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Too few graded studies
Top outcomes
Verdict
Too few graded studies
Top outcomes
Shared outcomes (1)
Outcomes where both Adapalene and Mandelic 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 cosmetic only. Leave-on mandelic acid is used at roughly 5-10% in serums; professional peels use higher strengths (often a salicylic-mandelic combination). Apply to clean skin, building frequency as tolerated, with daily sunscreen. There is no oral or systemic dose — it is not ingested. This library does not provide an ingestion protocol.
Evening
Leave-on serum (≈5-10% mandelic acid) or a professional (salicylic-)mandelic peel
Throughout
8-12 weeks
Throughout
First weeks
Throughout
8-12 weeks
8-12 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
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
RCT (n=50): 45% mandelic acid vs 30% salicylic acid peels every 2 weeks for six sessions over 12 weeks
Comparative Evaluation of Efficacy and Tolerability of Glycolic Acid, Salicylic Mandelic Acid, and Phytic Acid Combination Peels in Melasma.
Dermatol Surg (2016) · Rct · n=90
RCT (n=90): glycolic 35% vs salicylic-mandelic vs phytic acid peels for melasma over 12 weeks
Comparative Study of 35% Glycolic Acid, 20% Salicylic-10% Mandelic Acid, and Phytic Acid Combination Peels in the Treatment of Active Acne and Postacne Pigmentation.
J Cutan Aesthet Surg (2019) · Rct · n=45
Randomised trial in 45 patients: glycolic, salicylic–mandelic and phytic peels were compared over six dermatologist-administered sessions, every two weeks.
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 60).
No documented interaction was found in the data searched. This does not establish that this exact combination is safe.
AM/PM order, what to combine vs separate, and why sunscreen always comes first.
Bakuchiol vs retinol vs adapalene vs tretinoin — pick by strength and tolerance, not hype.
Benzoyl peroxide & retinoids → salicylic/azelaic/niacinamide → naturals, tiered by evidence.
Commonly recommended vs ask-your-clinician vs avoid — a general, safety-first overview.
The right pick depends on your goals. Answer a few quick questions for a personalised recommendation — or dig into the full evidence on each.