This author team from the Neural Dynamics Research Group at the University of British Columbia reviewed the potential toxicity of aluminum (Al) in humans through a variety of exposure sources, including food, cosmetics, water and vaccines. They focus on the potential role of Al adjuvants in neurological disorders such as ALS, Alzheimer’s disease and ASD. With respect to ASD, the authors argue that: 1) children from countries with the highest ASD prevalence appear to have the highest exposure to Al from vaccines; 2) the increase in exposure to Al adjuvants correlates with the increase in ASD prevalence in the United States; and 3) a significant correlation exists between the amounts of Al administered to preschool children and the current prevalence of ASD in seven Western countries. Applying the Bradford Hill criteria, the authors conclude “the correlation between Al in vaccines and ASD may be causal.”