A simple blood test could one day offer a glimpse into future health by predicting an individual's risk of early death, according to new research. Scientists have found that certain patterns of proteins circulating in the blood are linked to a higher risk of dying from any cause within five or ten years.
The study, using data from more than 38,000 adults aged 39 to 70 in the UK Biobank, analysed nearly 3,000 proteins in each blood sample. Researchers identified panels of proteins – ten for ten-year risk and six for five-year risk – that were associated with mortality after accounting for factors such as age, body mass index (BMI) and smoking.
These protein panels improved forecasting ability over traditional models based on demographic and lifestyle factors alone, although the gains were modest. The study suggests that some blood proteins may carry hidden signals about long-term health, reflecting processes like low-level inflammation or subtle organ stress.
However, the authors caution that the test is far from perfect. The predictive power is better than chance but still limited, and the proteins may simply be markers of underlying biology rather than causes of risk. Combined with other factors, the test could prompt earlier screening or lifestyle changes but cannot definitively predict when someone will die.
