I was surprised to first hear and then partially verify that you cannot get vitamin A toxicity from eating food, no matter how much liver you eat for example. Your body does not convert the pre-cursor (carotenoids/beta-carotene) from vegetables into Vitamin A fast enough to acquire toxicity through food. And similarly you apparently cannot get toxicity from an over consumption of liver (want better link/proof). You can achieve toxicity from preformed vitamin A supplements however. Does anyone have any links showing otherwise? Here are some links on vitamin A toxicity: