Many thanks for that info pete, i did a search and it confirmed what you said, heres the data:
Aluminum Toxicity can also mimic Alzheimer's. Headaches, forgetfulness, speech disturbances, and memory loss are symptoms common to both Alzheimer's and Aluminum Toxicity. According to Balch and Balch (Prescription for Nutritional Healing), aluminum itself cannot cross the blood-brain barrier and enter the brain but certain aluminum compounds such as aluminum fluoride can. Balch and Balch go on to say that aluminum sulphate and fluoride are in many municipal water systems and these chemicals can combine in the bloodstream to make aluminum fluoride which can enter the brain. One should also be wary of other sources of aluminum like aluminum cookware, antacids, buffered aspirin, anti-diarrheal preparations, aluminum cans, deodorants, douches, food additives like baking soda, frozen doughs, self rising flour, process cheese slices, and shampoos because the aluminum they contain may contribute to Aluminum Toxicity. The early stages of Alzheimer's may be slowed by the avoidance of aluminum products.