Polyphenol bioaccessibility and antioxidant properties of in vitro digested spray-dried thermally-treated skimmed goat milk enriched with pollen

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