I was just reading an article that was on iron and pregnancy and i knew that to much iron can be made for you but it said if u have to high amount each day in your multi V that it can prevent Zinc absorption and that can cause slow wound healing , loss of taste and smell.

i don't know if this is it or even close but i cant think of why else this would happen , as i only know of the metallic taste you get in the first few weeks of pregnancy