I have heard that vitamin E and other oil vitamin can build in your system is this possible or is this a rumor. Regarding toxicity – many vitamin E products have been shown to build up in the liver. UNIQUE E® is a pure, all-natural form of Vitamin E and contains no additional oils that could do this. Our E gets right to work in your body, and what isn’t used by the cells is passed out of your system and not stored in the liver.