What's the difference in benefits between calcium/vitamin d supplements and milk?

Quantity: Milk is food. It naturally contains some calcium, and it is often supplemented with some vitamin d...Usually enough so that you can utilize the calcium in the milk. The amount of vitamin d in milk is insufficient to keep blood vitamin d at adequate levels, unless you're drinking unhealthy quantities of milk and neglecting other sources of nutrition. You need more vitamin d than is in milk.

Avoid milk: Avoid milk unless organic. Contrary to popular opinion, milk may not be the most bioavailable source of calcium. A cup of broccoli has more calcium than a cup of milk. Green vegetables have plenty of calcium in them, and fewer environmental pollutants than milk. Green leafy vegetables especially spinach and kale should be organic. Calcium is best taken with magnesium.