Can aluminum cause Alzheimer's disease is a controversial question. Alzheimer's disease is the most common cause of senile brain disease and is a fatal and untreatable condition. It begins with learning memory deficits and progresses to involve all aspects of intellectual activity including judgement, calculation and language.

Post-mortem examinations of humans with Alzheimer's disease show that there are high concentrations of aluminum in the brain. However, aluminum normally is not found in healthy brain tissue and researchers do not know how the metal gets into the brain. Experimentally it is proven that aluminum is toxic to nerves in animals but the neuron degeneration is different from what occurs in humans.

The animals that respond to aluminum treatment with neuron degeneration are rabbits, cats and dogs. If these animals are injected with aluminum salts directly into the brain they show learning memory deficits, become slower and lose curiosity. This picture resembles remarkably certain features of Alzheimer's disease. But the neuron degeneration is not the same as the one seen in Alzheimer's disease.

In conclusion, the cause of Alzheimer's disease and any association with aluminum is still unknown. However, researchers caution that more studies are required.