Barberry Bark

Barberry bark is the dried root bark or stem bark of Berberis vulgaris L., a spiny shrub native to Europe and western Asia, and of related Berberis species. Nustras supplies it as a dried bark powder and as a bark extract powder; the bark's characteristic constituents are isoquinoline alkaloids, principally berberine, which colours the inner bark yellow, together with berbamine and palmatine.

The material is formulated into botanical and herbal supplements in capsule, tablet and powder form, into multi-herb blends and premixes, and into herbal teas where a barberry bark ingredient is required.

The material is a yellow-brown to brown powder with a bitter taste. Berberine content or extract ratio, loss on drying, particle size and extraneous matter are standardised to specification; identity is confirmed by botanical identification and chromatography, and heavy-metal, pesticide-residue and microbial limits are supplied to specification and confirmed on each lot's certificate of analysis.

Nustras supplies barberry 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. Berberis bark is a regulated botanical whose status differs between markets; buyers confirm the permitted species, plant part, berberine level and claim for their application. Contact us for grade, pricing per kilogram and lead time.