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  • Polyphenol bioaccessibility...
    Kostić, Aleksandar Ž.; Milinčić, Danijel D.; Stanisavljević, Nemanja S.; Gašić, Uroš M.; Lević, Steva; Kojić, Milan O.; Lj. Tešić, Živoslav; Nedović, Viktor; Barać, Miroljub B.; Pešić, Mirjana B.

    Food chemistry, 07/2021, Letnik: 351
    Journal Article

    Display omitted •HPLC analysis showed that TTSG milk/pollen powder is good source of polyphenols.•After in vitro digestion of sample, the total polyphenols recovery was 30.71%.•TTSG milk/pollen powder exhibited good antioxidant properties.•TTSG milk/pollen powder could be a good functional ingredient. The aim of research was to determine polyphenols bioaccessibility and antioxidant properties of thermally-treated skimmed goat milk enriched with sunflower bee-collected pollen through in vitro digestion. HPLC analysis confirmed that pollen-enriched milk contained flavonols as the main phenolic fraction (80.7–76.2%) followed by phenolic acids (14.2–17.4%). Among individual compounds quercetin-3-O-glucoside (155.1–197.2 μg/L) and p-coumaric acid (29.5–30.7 μg/L) were the main quantified flavonols and phenolic acids, respectively. After digestion of milk/pollen sample, total polyphenols recovery was 30.71% with higher phenolic acids recovery (40.1%) compared to flavonols (28.3%) indicating strong interactions between caprine milk casein micelles and pollen polyphenols. Applied antioxidant assays (phosphomolybdenum, ABTS•+scavenging activity and ferrous-ion-chelating capacity) have confirmed complexity of prepared product- it had high ability to quench ABTS•+ radicals and to form chelating complexes with Fe2+ ions. Digestion provoked 20% reduction in total antioxidant capacity compared to the initial sample. TTSG milk/pollen powder could be good functional ingredient.