The analyses were performed by HPLC–MS/MS, which included a fast ‘‘dilute and shoot’’
sample preparation. Average decreases in FA concentration of 46% were observed after one year. Fresh
juices (shortly after bottling) showed the highest deviations from the declared label value (up
to + 89%). Label values did not reflect the actual concentration of FA in these products, making it difficult
to determine the intake of this vitamin.