主题：【一唵谈】喝牛奶会导致骨质疏松吗？ -- 唵啊吽

来源同上，也是来自哈佛公共健康学院的网站。

Some other factors may also help lower the risk of osteoporosis:

Take care with caffeine. Although the votes aren't all in, there is some evidence that drinking a lot of coffee - about four or more cups per day - can increase the risk of fracture. Caffeine tends to promote calcium excretion in urine.

Avoid too much protein. Getting too much protein can leach calcium from your bones. As your body digests protein, it releases acids into the bloodstream, which the body neutralizes by drawing calcium from the bones. Animal protein seems to cause more of this calcium leaching than vegetable protein does.(3) Just how important protein is as a risk factor for osteoporosis is still up in the air.