Willow Bark
- Region
- North America; independently Egypt
- Tradition
- Native American tribal medicine (Cheyenne, Ojibwe, etc.); Egyptian Ebers Papyrus
- Era
- Ancient (pre-500 CE)
- Science
- Yes
- Today
- Niche / Regional
- Traditional logic
Bitterness used as a heuristic for potency (like cinchona bark); later found to contain salicin (aspirin precursor)
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