Antioxidant capacity, nutritional and phytochemical content of peanut (Arachis hypogaea L.) shells and roots

Abstract

This study evaluated antioxidant capacity, nutritional and phytochemical content of shells and roots of peanut (Arachis Hypogaea L.) for potential utilizations. Total dietary fiber, protein, ash and alkaloid per 100 g dry weight samples ranged from 58.8 to 78.2 g, 5.8 to 6.1 g, 6.6 to 21.7 g and 5 to 23.8 g, respectively. While total phenolic, total saponins and phytic acid per 100 g dry weight samples ranged from 175 to 431 mg tannic acid equivalent, 10.8 to 23.4 mg and 108 to 159 mg, respectively. Peanut roots exhibited the highest total dietary fiber, phytochemical content and the highest α,α-diphenyl-β-picrylhydrazyl (DPPH) radical scavenging activity.

Keywords: Arachis hypogaea L, peanut shell, peanut root, total dietary fiber, phytochemical, antioxidant