What it is
Juglans Nigra Leaf Extract is derived from the foliage of the North American black walnut tree. In formulations it is included as a plant-based skin-conditioning agent, often valued for the astringent and tannin-rich character typical of walnut botanicals. It usually appears at low concentrations within the supporting botanical blend of a product rather than as a primary active.
Safety & warnings
Walnut-derived botanicals are generally well tolerated at the low levels used in cosmetics. Because walnut is a recognized tree-nut allergen, individuals with tree-nut sensitivities may wish to use caution, though leaf extracts contain little of the nut protein associated with food allergy. Plant extracts can occasionally provoke contact sensitivity in predisposed users.
Origin & sourcing
Natural; obtained by extracting the leaves of Juglans nigra, a tree native to eastern North America. The extract is typically prepared in water or a water-glycol solvent system.
Questions everyone asks
What does black walnut leaf extract do in a sunscreen?
It serves as a botanical skin-conditioning and astringent additive, contributing to the supporting plant blend rather than providing sun protection itself.
Is it a UV filter?
No. It is a botanical extract used for skin conditioning, not a UV filter, and it does not provide measurable sun protection on its own.