Question to the Department for Environment, Food and Rural Affairs:

To ask Her Majesty’s Government what is their assessment of the European Food Safety Authority's (EFSA) view that three unpublished industry-sponsored carcinogenicity studies on mice played an important role in informing EFSA’s decision that the herbicide glyphosate is not carcinogenic to humans.

The European Food Safety Authority concluded that glyphosate is unlikely to pose a carcinogenic hazard in humans. This conclusion followed a very thorough consideration of a wide range of scientific data, including a number of studies on laboratory animals.

The mouse carcinogenicity studies were performed by independent testing laboratories and comply with the applicable OECD test guideline and Good Laboratory Practice. Carcinogenicity studies in mice are among the many EU data requirements for pesticides, and help to establish whether or not an active substance in a pesticide has carcinogenic potential.

Under the regulatory system for pesticides, studies are not published because of the danger that data may be wrongly used to support other rival applications for authorisation. However, requests to view the documents can be submitted to the Health and Safety Executive’s Chemicals Regulation Directorate and will be considered on a case-by-case basis.