From Vaccine Papers:
Dr Paul Offit is a well-known vaccine advocate and doctor at the Childrens Hospital of Philadelphia (CHOP), where he is director of the Vaccine Information Center.
… Dr Offit is asserting that aluminum is a nutrient, i.e. a mineral with healthful functions in the human body. This is absolutely false. Aluminum has no healthful function in the body. It is a toxin and a toxin only. The fact that aluminum concentrations increase in the blood and change in some tissues does not in any way mean or suggest that aluminum is doing good or necessary functions. Its just moving around the body as all substances are known to do.