Scientists working on a blood test which could tell us our risk of developing different diseases a decade in advance have declared a “new frontier of science”. A groundbreaking study of half a million Brits is analysing how levels of up to 5,400 proteins circulating in our body change in mid-to-late life and influence how we age and what diseases we develop from Alzheimer's to heart disease and multiple sclerosis . The UK Biobank is leading the world in the new discipline of “proteomics” after