“…Kamchatka berry fruits contain sugars (mainly fructose and glucose) and minerals including K, P, Ca, Fe or organic acids (citric acid predominates, with malic and phytic acids also present in smaller amounts [ 13 ]). Kamchatka berry fruits are characterised by a high content of biologically active compounds with high antioxidant activity, including polyphenols, the main representatives of which are chlorogenic, coffeic and ferulic acids [ 12 , 13 , 17 ]. The most important compounds belonging to the flavonoid group found in kamchatka berry fruit are quercetin 3- O -rutinoside, quercetin 3- O -rhamnoglucoside, luteolin 7- O -rutinoside, luteolin 7- O -glucoside, diosmin, proanthocyanidins and catechins, while anthocyanins are mainly represented by cyanidin-3- O -glucoside [ 12 , 13 , 14 , 15 , 18 ].…”