Phrases & Sayings0 min ago
No best answer has yet been selected by natalie_1982. Once a best answer has been selected, it will be shown here.For more on marking an answer as the "Best Answer", please visit our FAQ.
Because lactose ('milk sugar') is inherent in milk.
UHT merely means unpasteurised, fresh milk is heated to an Ultra High Temperature in order to kill bacteria and increase its preservation properties. I understand that this changes the properties of some of the milk fats (hence the different taste) but the process certainly does not remove anything.