but things like milk contain calcium and we need plenty of this for strong bones.
Both of these would seem to be true, yes.
Thus if u have too little calcium surely you're more likely to get illneses such as osteoporosis?
Calcium deficiency is a leading cause of osteoporosis I believe.
It would appear to follow therefore that if you drank more calcium-laden milk all would be fine and if you had places were there was less milk consumption then there would be more osteoporosis.
In fact, the opposite is true. The USA & Canada have the highest milk consumption in the world and also the highest rates of osteoporosis. In China, conversely, milk consumption is very very low, but so is the incidence of osteoporosis.
wtf? I hear you ask.
Well, he posits that this anomaly occurs because although the diet starts calcium rich, the calcium is leeched from the american body (maybe due to excess net acidity?) due to the excessive protein in the diet (dairy consumption a contributor) causing you to pee out lots of calcium. In the chinese body, calcium levels are sufficient to begin with (plenty of calcium in non-dairy vegetarian diets), but with normal levels of fat/protein in the diet, there is no leeching in the same way as in the USA.