its not all vitamins, it high doses of e and a. current vitamin pills,like in GNC have ultra high doses of these hings. you just dont need so much. 20K of A a day can give you liver damage/ i have not read the study so I dont know the dose used, but if its like usual reportage, they just asked people what they took and did not control for it well, so it will be unanswered.
the original study gave enough beta carotene to actually change skin color