This document discusses co-production, co-design, and co-construction of dementia policy. It notes that 47 million people worldwide live with dementia, including around 850,000 people in the UK. It emphasizes that health and social care services should make use of the insights and skills of those using the services, and that genuine collaboration is needed between those with lived experience of dementia and professional expertise. The document explores different approaches to co-production, co-design, and how greater involvement of those with dementia and their unpaid carers is important for more effective policy.