The causes of this behaviour are due to the copigmentation effect that takes place progressively. The CAE + AA sample showed big losses from the 1 weeks of storage, making evident the deleterious effect of the ascorbic acid on the anthocyanins colour. Strawberry juices (pH 3.4) showed losses in C∗ of the 30% after 25 days (aproxx. 4 week) of storage at 25 °C ( Garzón & Wrolstad, 2002), while the CAE + R and CAE samples were stable during the first 6 weeks of storage at 20 °C.