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Head-to-head evidence comparison — which supplement is right for you?
Azelaic Acid and Mandelic Acid (topical) are closely matched across evidence, studies, and safety.
Verdict
Mostly mechanism / observational
Top outcomes
Verdict
Mostly mechanism / observational
Top outcomes
Shared outcomes (2)
Outcomes where both Azelaic Acid and Mandelic Acid (topical) have evidence — compare verdict strength side-by-side.
Topical only. OTC cosmetic azelaic acid is typically around 10%; prescription strengths are 15% gel/foam (rosacea) and 20% cream (acne), applied as a thin layer to clean skin once or twice daily. There is no oral, injectable, or systemic dose. For rosacea or persistent acne, the prescription form under a clinician is the evidence-based route. This library does not provide an ingestion protocol.
any
Leave-on topical gel, foam, or cream (OTC ~10%, or prescription 15-20%)
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
4-15 weeks
8-24 weeks
4-12 weeks
Throughout
8-12 weeks
8-12 weeks
Throughout
Efficacy and safety of azelaic acid (15%) gel as a new treatment for papulopustular rosacea: results from two vehicle-controlled, randomized phase III studies.
J Am Acad Dermatol (2003) · Rct · n=664
Two double-blind, vehicle-controlled phase III RCTs (664 patients total) of 15% azelaic acid gel twice daily for moderate papulopustular rosacea
A comparison of 15% azelaic acid gel and 0.75% metronidazole gel in the topical treatment of papulopustular rosacea: results of a randomized trial.
Arch Dermatol (2003) · Rct · n=251
Multicenter, double-blind, randomized head-to-head trial in 251 patients with moderate papulopustular rosacea over 15 weeks
Interventions for rosacea.
Cochrane Database Syst Rev (2015) · Systematic review
Cochrane review of 106 RCTs (13,631 participants) of rosacea treatments with GRADE quality assessment
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
RCT (n=45): glycolic vs salicylic-mandelic vs phytic peels biweekly for six sessions
Both Azelaic Acid and Mandelic Acid (topical) are closely matched — the best choice depends on your specific health goals.
For even skin tone, Azelaic Acid has a higher relevance score (80 vs 55).
No known interactions between Azelaic Acid and Mandelic Acid (topical) have been documented in our database. However, always consult a healthcare provider before combining supplements.