Vitamin A

Vitamin A is a fat-soluble vitamin that is essential for various bodily functions, including vision, immune system performance, skin health, and cellular communication. In the context of autism , vitamin A has been explored as a potential intervention due to its role in brain development and immune function. However, the evidence supporting its use specifically for autism is limited and not well-established. There is very limited research specifically examining the effects of vitamin A supplementation on autism symptoms. Most studies that do exist are small and preliminary, often focusing on the role of vitamin A in immune function or vision rather than on autism directly. Excessive intake of vitamin A, particularly in its preformed form (from supplements or animal sources), can lead to toxicity (hypervitaminosis A). Symptoms of toxicity include nausea, headache, dizziness, and, in severe cases, liver damage and increased intracranial pressure.
While vitamin A is essential for health, there is no strong evidence to suggest that it has a specific or significant impact on the core symptoms of autism. Supplementation should be approached with caution, particularly given the risks associated with excessive intake.