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A-F grade per outcome, combining overall evidence with goal-specific relevance. A = strong evidence; F = insufficient. Hover a badge for details.
Topical cosmetic only. HA serums are applied to clean, slightly damp skin once or twice daily and sealed with a moisturizer to hold water in (in very dry air, HA applied to dry skin can draw moisture outward). There is no oral, injectable, or systemic dose in this cosmetic context. This library does not provide an ingestion protocol.
Any time
Leave-on serum with high- and low-molecular-weight HA, sealed with a moisturizer
Topical cosmetic only. Leave-on lactic acid is used at roughly 5-12% (lower for hydration, higher for exfoliation); professional peels use higher strengths. Apply to clean skin, often at night, 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 lotion or serum (≈5-12% lactic acid)
Throughout
1-8 weeks
4-8 weeks
Throughout
2-8 weeks
8-22 weeks
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