Alder Bark

Alder bark has been used in European folk herbalism as a drying, toning, and occasionally anti-inflammatory plant material. It was historically employed in washes, decoctions, and poultices for minor skin irritation, sore throat applications, and some digestive uses. The bark, like many astringent tree barks, was valued more for broad traditional action than for a narrowly defined modern clinical role.

Modern supplement use of alder bark is limited. It does not have the large body of human research seen with major contemporary herbs, and much of its reputation comes from traditional herbal practice. Its main activity is thought to come from tannins and other polyphenolic compounds that help tone tissues and reduce excess moisture or irritation.

Today, alder bark is more likely to appear in traditional loose-herb formulas than as a standalone mainstream supplement. It is best understood as a niche astringent botanical with modest evidence and primarily historical relevance.

Alder bark contains tannins and related compounds that have a contracting effect on tissues. This astringent action may help reduce minor irritation, weeping skin conditions, or excessive secretions when used topically or as a gargle.

In practical terms, alder bark works much like other traditional tannin-rich barks: it dries, tones, and mildly calms irritated surfaces. That can be useful for supportive care, but it is not a substitute for evidence-based treatment of serious inflammation or infection.