Aims and methodLeaflets are commonly used as a way of providing information to users. In this study, we use a simple index of ‘readability’ to compare a range of leaflets available to people with mental health problems.ResultsThe majority of the leaflets contained passages that are likely to be beyond the comprehension of people with mental health problems.Clinical implicationsLeaflets are a cost-effective way of providing information, but only if the text can be understood by the target audience.