IIRC, most small children (toddlers and infants especially) are not lactose intolerant. In general, giving a breast milk substitute is a good thing if breast mi

IIRC, most small children (toddlers and infants especially) are not lactose intolerant. In general, giving a breast milk substitute is a good thing if breast milk isn't available. In fact, at a young enough age, milk is vital to survival in most cases. But as folks grow older, they can stop making the enzymes that break down milk. This happens less often if milk is kept in the diet and more often if you have genes that increase your chances of intolerance. This usually happens more often where milk isn't a staple food source for the population. Edit: Forgot a sentence.