Milk contains a lot of calcium but in a form that is most difficult for humans to absorb. As a result, the calcium passes right through your system and is excreted as waste.Only in raw milk is the calcium easily absorbable. Raw milk, however, is just about impossible to obtain, as most states have out-lawed the sale of raw milk. There are other ways to get your daily intake of calcium.

10 ways to get enough calcium if you're lactose intolerant | Spine-Health