In one study, funded by the National Dairy Council, a group of postmenopausal women were given three 8-ounce glasses of skim milk every day for two years, and their bones were compared to those of a control group of women not given the milk. The dairy group consumed 1,400 mg of calcium per day and lost bone at twice the rate of the control group. According to the researchers, "this may have been due to the average 30 percent increase in protein intake during milk supplementation. ... The adverse effect of increases in protein intake on calcium balance has been reported from several laboratories, including our own" (they then cite 10 other studies). Says McDougall, "Needless to say, this finding did not reach the six o'clock news." This is one study that the dairy industry won't be repeating any time soon.
