I've heard something about avoiding vitamin A and pregnancy; can someone explainn this to me? I know that diet shakes are not recommended because of the vitamin A content (I don't drink them anyway) but what about "Up & Go"? I drink them sometimes and just had one this morning, then I check the ingredients and it says vitamin A- 17% RDI. Is this normal or added? I checked other drinks out of curiosity, like the juice in my fridge and the Milo tin, none of those say vitamin A. Should I be avoiding anything that has vitamin A as an added ingrediant like Up N go? Why?