The dairy and meat industries for many decades have been very successful at lobbying governments in Canada and USA that their products are essential for human health. These industries when challenged on their nutrition claims become very defensive and immediately deploy aggressive communication tactics rather than simply letting scientific information (which they claim to have) do the talking for them. The expression, "the lady doth protest too much, methinks," comes to mind. It is impossible to deny the high correlation between the big uptick (and trending higher) in things like heart disease, hypertension, out-of-whack blood chemistries in wealthy nation populations where meat and dairy are heavily subsidized and readily available. It wasn't that long ago that the tobacco industry was allowed to promote its products as having health benefits -- the more you live, the more you learn. For the record: I am not a vegetarian or vegan and never have been.