Multiple choice general knowledge science & technology The colour of cow’s milk is slight yellow due to the presence of? Xanthophyll Riboflavin Ribulose Carotene Reveal answer Fill a bubble to check yourself D Correct answer Explanation Cow's milk appears slightly yellow due to beta-carotene, a pigment from fresh grass that cows consume. Carotene is a fat-soluble antioxidant that gets incorporated into the milk fat, giving it the characteristic yellow tint.