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Written Question
Chlorine Dioxide: Autism
Wednesday 9th July 2025

Asked by: Daniel Francis (Labour - Bexleyheath and Crayford)

Question to the Department for Science, Innovation & Technology:

To ask the Secretary of State for Science, Innovation and Technology, what assessment he has made of the potential impact of online misinformation in the use of chlorine dioxide in treatments for autism on people with autism; and what steps he plans to take to help tackle this.

Answered by Feryal Clark - Parliamentary Under Secretary of State (Department for Science, Innovation and Technology)

This government recognises the damaging impact online misinformation can have. Autism is not a medical condition with treatments or a "cure". The NHS website highlights that products falsely claiming to be cures or treatments for autism are harmful, including chlorine dioxide.

The Online Safety Act requires platforms to tackle illegal health mis- and disinformation content on their services for all users – these requirements have been in place since March. Additionally from 25 July, services in-scope of the Act that children can easily access, will be required to protect them from legal but nonetheless harmful content, including that which encourages the ingestion, inhalation or exposure to harmful substances.