evidence: Some people believe that exposure to aluminum, particularly through vaccines, may contribute to the development of autism spectrum disorder (ASD). However, the scientific evidence on this topic is mixed, and the issue is far from settled. [...] One of the main arguments against the aluminum-autism link is that there is no clear biological mechanism by which aluminum could cause ASD. The brain is a highly complex organ, and the causes of autism are likely to be multifactorial and involve a combination of genetic and environmental factors. While aluminum has been shown to be neurotoxic in high doses, there is no evidence to suggest that the levels of aluminum found in vaccines or other sources are capable of causing neurological damage.