Black Willow

Black willow, Salix nigra, is a willow tree native to eastern North America whose bark is a traditional botanical raw material and contains the phenolic glycoside salicin together with tannins and flavonoids. Nustras supplies black willow bark as dried cut bark, milled powder and standardised extract powder for the botanical supplement and herbal product trades.

It is formulated into herbal capsules and tablets, botanical blends, tinctures and liquid botanical preparations, and herbal teas and tisanes, by supplement manufacturers and contract formulators.

The dried bark is a grey-brown to reddish-brown fibrous material with a bitter, astringent taste; the powder is light brown and the extract a brown powder. Identity is confirmed by macroscopic and microscopic examination or by HPTLC against a reference, with salicin content standardised to specification by HPLC. Heavy-metal and microbial limits are supplied to specification and confirmed on each lot's certificate of analysis.

Nustras supplies black willow bark in bulk commercial quantities, in food-grade bags and fibre drums, to manufacturers and formulators internationally, with a certificate of analysis, specification sheet and country-of-origin documentation on every lot. Willow bark is an accepted botanical ingredient in major supplement markets, subject to market-specific conditions of use; buyers confirm the permitted species, level and claim for their application. Contact us for grade, pricing per kilogram and lead time.