I researched this a little further and learned that in the U.S. our tolerance for lactose is much greater. Somewhere in the neighborhood of 15-30% of our citizens suffer ill side effects from lactose, whereas in Asia the percentage swells to 90%. And why is our number so much lower here in the states you may ask? Two words: white people. Yes, UV exposure and dance floors may be our kryptonite, but not milk.