Walnut Basic

Walnut shells themselves are not typically consumed, but they contain trace nutrients and compounds that reflect the richness of the walnut inside.

While the edible walnut kernel is packed with omega-3 fatty acids, protein, and antioxidants, the shell is mostly composed of cellulose, lignin, and polyphenols. These compounds give it strength and durability, and some studies suggest the shell contains small amounts of bioactive substances with antimicrobial and antioxidant properties—useful in cosmetic and industrial applications.