Alzheimer’s is one of the most feared disorders, caring for sufferers threatens to bankrupt the NHS and there is growing evidence that your risk is related to known life-style factors. So how many hundreds of millions are being spent to identify those at risk – there are tests already available – and putting them on programs to reduce it? None. In fact less than 2% of Alzheimer’s research goes on ways to improve prevention. Patrick Holford explains how to help yourself.