DEAR DOCTOR K: Many years ago, my doctor told me that men, like women, should take calcium supplements. So I have been. Now I hear that it's a bad idea. What do you think?
DEAR READER: All of us -- patients and doctors -- wish we had all the answers, and that the answers never changed. Unfortunately, the way the human body works, and malfunctions, is very complicated. To understand it, we conduct research. But no study is perfect, and the answers sometimes change as larger and better studies are conducted.