Vitameatavegamin

This link provides effects of deficiencies of some vitamins and minerals. The interesting bit is, it also provides effects of too much of same. Some of the "too much" effects were far worse than those of the deficiencies, and some were identical. No wonder I've never been able to tolerate designer vitamins - the doses are often dangerously high. Vitamin A was particularly grim, but even the more seemingly innocuous ones like calcium are a problem at high doses. Worth a read and fact cross-referencing.