Phenolic antioxidant profiles in the whole fruit, flesh and peel of apple cultivars grown in Lithuania

•HPLC-DAD-FRAP assay evaluate the content and reducing capacities of individual phenolic compounds.•The comprehensive phenolic characterization by reducing activity of apples to date.•The phenolic content and reducing activity vary based on cultivar and part of apple used.•Procyanidins and chlorogenic acid could be markers of reducing activity in apples.