Levels of antibodies in saliva are associated with the risk of mortality, revealed researchers at the University of Birmingham. This means there could soon be a saliva test that could predict if you are at a risk of dying.
The researchers observed that lower levels of antibodies in saliva are associated with of an elevated risk of mortality, and could be an early indicator of risk. The study examined associations between secretory immunoglobulin A (IgA), the common antibody found in saliva and mortality rates in the general population.
The team believe that as it appears to be a marker of mortality risk and is much less invasive than blood sampling, saliva sampling to determine IgA secretion rate has the potential to be used as an indicator of overall health by professionals as part of a general check-up.
The study is published in PLOS ONE.