Antiradical activity of different parts of Walnut (Juglans regia L.) fruit as a function of genotype

► We showed individual phenolic compounds in different genotypes by HPLC. ► We conclude that antiradical activity related to both content and type of phenol. ► We peruse the impact genotype and environmental factors on antiradical activity. ► We propose walnut fruit by-products phenolic extract for preventing of some diseases.