Changes in phenolic acids of black carrot jams and marmalades during in vitro gastrointestinal digestion, expressed as percentage. The terms represent; initial, as
initially determined from sample matrix with chemical extraction (100% in percent); PG, phenolic acids remaining after gastric digestion; IN, dialyzed fraction after intestinal
digestion; OUT, non-dialyzed fraction after intestinal digestion. Data represent average values ± standard deviation of three independent samples. Different letters above bars
within each sample represent statistically significant differences (p < 0.05).