Black Walnut

Black walnut is Juglans nigra, a large deciduous tree of the walnut family native to eastern North America. The part used in the botanical trade is the hull, the fleshy green outer covering of the unripe nut, dried before it darkens. Nustras supplies it as dried hull powder and as a hull extract powder. The hull contains juglone, a naphthoquinone, and tannins, and stains dark brown on handling.

Black walnut hull is formulated into botanical supplements in capsule, tablet and liquid form, into tinctures and multi-herb formulas, often combined with wormwood and clove, and into herbal tea blends.

Supplied as a dark brown to greenish-brown powder with a faint, slightly bitter odour. Botanical identity is confirmed by macroscopic examination and thin-layer chromatography; particle size, moisture and ash are standardised to specification. Heavy-metal, pesticide and microbial limits are supplied to specification and confirmed on each lot's certificate of analysis.

Nustras supplies black walnut 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. Black walnut hull is an accepted botanical ingredient in major supplement markets; buyers confirm the plant part, preparation and permitted claim for their application. Contact us for grade, pricing per kilogram and lead time.