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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
8-12 weeks
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