White Willow Bark
Bark extract that delivers salicin (natural BHA precursor) alongside tannins and polyphenols.
Salicin is metabolised to salicylic acid; tannins provide astringent action.
- Gentle BHA action
- Astringent
- Antioxidant
What the evidence supports.
- All skin types
No notable contraindications reported.
Apply early in routine, toner/essence step.
Concentration range in well-formulated products: 1%–5%
Year-round.
Salicin was the precursor to synthetic aspirin.
No specific deficiency signals tracked for this ingredient.
Often co-listed with synthetic salicylic for label-claim purposes.
The research behind White Willow Bark.
Every claim on this page traces to published research. Findings below are drawn from randomized trials and systematic reviews, each links to the study on PubMed.
American Journal of Clinical Dermatology, 2020
Journal of Cutaneous Medicine and Surgery, 2020
Journal of Advanced Research, 2015
Dermato-Endocrinology, 2011
No flagged conflicts. Still, patch-test new actives.
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