Flavored yogurt was prepared by adding three different levels (0.2, 0.4 and 0.6% by weight) of the
colorant powder to raw milk. Then the raw milk was pasteurized at 63ºC for 30 minutes and cooled down to
45ºC before a 0.02% (w/w) of the commercial probiotic dairy starter (ABT-5, Chr. Hansen’s, Denmark) was
inoculated. The yogurt was incubated at 40-42ºC until the pH of 4.5-4.6 was reached. The yogurt samples
were stored at 4ºC for 21 days. For each sample group, three cups of yogurt were sampled randomly every 3
days until 21 days and used for color, pH, and total acidity determinations [11].