Despite the huge deterioration in anthocyanin content caused by storage, significant differences between Ultrasound treated and untreated samples became visible after 8 weeks of storage, especially for Cy-3-S. The more pronounced losses of bioactive compounds may be related to oxidation reactions, initiated by the interaction with free radicals generated during sonication (Soria &Villamiel, 2010; Tiwari, O'Donnell, & Cullen, 2009).