Walnut (Juglans regia L.) oil chemical composition depending on variety, locality, extraction process and storage conditions: A comprehensive review

This review presents a comprehensive synthesis of walnut oil chemical composition data (major and minor compounds) collected from the literature according to varieties geographic origins walnuts, extraction processes. Considered as influencing factors, pre- post-harvest treatment parameters in shell-walnut kernels were identified works on stability discussed pre-treatment, processes their storage conditions. Most studies dealt with quantification fatty acids tocopherols. There has been less interest triacylglycerol components (sterols, volatiles, phenolic oil. The volatile compound profiles mainly determined define oxidative degree better understand effect acid degradation organoleptic properties Unfortunately, sensory analyses rarely performed. highlights lack knowledge sampling before analysis distortion between some results compounds. Impact variety, process was documented but few have considered temporal factor harvest, packaging conditions oil, which influence its consequently nutritional taste qualities.