Titanium dioxide is not a poison. It's a pigment used to make things white. Vitamin E is good for you. Whether it comes from a plant or from a factory makes no difference. It's the very same chemical.

All medical products have added ingredients called adjuvants. For example, the lowly aspirin tablet is not pure aspirin. If it were, the tablet wouldn't hold together. There has to be a binder. Other medicines are so potent, they have to be diluted in order to have a tablet large enough to handle.