"Don't worry about an excess of vitamins. The body will take what it needs and eliminate the rest." That old wive's tale might be true in a perfect world. In the Real World, it just doesn't happen that way. Calcium is the most heavily advertised supplement of all of them, and does the most damage in excess. How much is excess? Your chemistries know, but in the 3,000 patients we have seen, plus the many thousands Dr. Huggins has consulted with other doctors about, calcium contamination is the number one problem. Iron and Vitamin B-12 have very narrow limits, and it is exceedingly easy to exceed them.