According to the WHO, Alzheimer’s ranks as the seventh leading cause of death globally. By 2050, or earlier in the absence of a breakthrough, the number of people aged 65 and older with Alzheimer’s is projected to reach 12.7 million people. But the more you know about dementia, the more tools you’ll arguably have to prevent or delay its onset.

In this episode neurologist Dr Richard Restak in conversation with science journalist Alex Wilkins arms us with practical advice for how to reduce the risk factors - from better sleep, diet, regular exercise and physical activity to the importance of maintaining social networks and intellectual stimulation, as well as the advantages and disadvantages of new medicines.