World wide people with the strongest bones Chinese, African etc consume the least amount of calcium and vice versa. Animal proteins are the main cause of osteoporesis. Animal proteins are acidic and cause the bones to dissolve and change the kidney physiology so the bone material is urinated into the toilet. I am confused here. People may be confused, but much of the confusion can be solved by looking at the world picture.
People living on high starch diets are trim and avoid common diseases.
When Asians and Africans move to the US they get fat and sick because of the change to the higher fat and higher protein, low carbohydrate diets. Really can't say. I have heard that atrial fib is caused by sudden drop in blood sugar from to many carbs. They can take calcium pills, but milk is too dangerous. They can also be found at major chains and health food stores.