“…13 Depending on the cultivar, the prickly pear may present three different pulp colors (red, yellow and white), due to the presence of water-soluble pigments such as betacyanins (purple-red) and betaxanthines (yellow-orange), used as natural food colorant. 14 This fruit also represents an interesting source of functional and healthy compounds, including total phenols, flavonoids, carotenoids, betalains, vitamins, free amino acids and the minerals Ca, Na, Mg, Zn, Fe, Mn and Se, 5,[15][16][17] with varying biological activities. 18,19 The identification of geographic provenience of food represents, first, a current and global issue for consumers, who show increasing interest in the traceability of food supply, and, second, an important quality parameter to bring about the protected denomination of origin for some foods.…”