With the spotlight at this week’s Alzheimer’s Association International conference firmly fixed on the first approved therapies, advances in diagnosing the neurodegenerative disease - on which effective use of new drugs will hang - attracted less attention. However, hand-in-hand with the development of anti-amyloid drugs, development of blood-based biomarkers has made significant progress and they now have the potential to form the basis of easy to access and low cost tests.