In her recent lecture to thal community, Dr. Kirby expressed concerns of taking lot of vitamin, mineral and calcium pills. She said these supplements should best come through natural food. However, it is almost impossible to have a balanced diet so sometimes it is necessary to take these minerals. Calcium for example, in her opinion should be supplemented through milk etc. She said the calcium tablets can cause kidney stones if left unabsorbed.
It is a difficult topic, how much of which and when is a question that varies with the body.