When writing health information for patients and service users, using reliable sources and evidence is key to ensuring it is high quality and can be trusted.

What's the most appropriate source to use for producing health content? The Patient Information Forum (PIF) has published a factsheet called  'What source when? Creating realiable and accurate information', that provides an introduction to the difference sources of evidence that exist, and considers what sort of source you might want to use for different sorts of health content.