Abstract
Walnuts belong to the Juglandaceae family, and despite the tree producing several anatomical layers, the kernel remains the primary commercial product. A walnut fruit consists of the edible seed, its thin protective coat, the lignified shell, and an external green covering known as the husk. In commercial production, only the kernels are harvested, while the green husk is usually left unused, resulting in large amounts of agricultural residue. Growing research, however, indicates that this neglected husk contains significant levels of bioactive molecules with notable antioxidant and antimicrobial potential. Because of this renewed interest, the present review brings together current findings on the husk of Juglans regia, focusing on its free-radical- scavenging activity, identified phytochemicals, and possible applications in functional, pharmaceutical, and industrial sectors.
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Judged core plant research, but no claim was extracted from this abstract.