i just finished reading this for one of my physical anth classes.. so what the heck..this is from physical anthropologist/primatologist sarah blaffer hrdy (and the opinion any other self-respecting anthropologist/biologist/geneticist/evolutionscientist/primatologist/etc). "A suprising amount of epidemiological history can be read into the genes of surviving human populations. Genes can also tell us something about what foods people were adapted to eat. Consider the genes for lactose tolerance. All baby mammals are born with the digestive equipment to synthesize the enzyme lactase. This enzyme enables them to break down and digest lactose, the carbohydrates in milk. Among many humans around the world the ability to digest milk sugars does not persist into adulthood. After all, being able to digest milk would be completely useless to adult foragers, who do not herd animals. Individuals who lack the appropriate enzyme to drink unprocessed milk may suffer from gas or diarrhea. This is why Western aid, which typically included powdered milk, got such a bad name in large areas of sub-Saharan Africa in the 1970s. Instead of helping, the donated milk powder made people sick. Today, the main explanation for why so much diversity in milk tolerance exists is that since the end of the Pleistocene, some human populations began herding cows and consuming dairy products; others did not. In another example of rapid evolution, just in the last ten thousand years, the genes that promote lactase synthesis past infancy spread in populations where milk was fed long past weaning, and were lost where it was not. Fewer than 2 percent of adults in a population with a horticultural history, such as the Bantu of Central Africa, test positive for lactose digestion, and no Kung! do. By contrast, 90-100 percent of Tutsi populations in Rwanda and the Congo- all descended from milk-dependent pastoralists- retain the capacity to digest milk sugars throughout their lives."moral of the story: lactose tolerance is a genetic anomaly. take the test or try an eliminatin diet. i may be vegan (and hence morally opposed to eating dairy products) but i trust solid science over propaghanda. if you want dairy and you can eat dairy have at it, if you can handle small amounts and you're comfortable eating it, go for it.. if you can't eat it try something different like soy or rice milk. take the test or eliminate it from your diet and find out for yourself.