The scientists tested their method to see how well it predicted mortality from any cause in 1,513 women and men born in 1921 and 1936.
Participants in the highest CheekAge group were 148 per cent more likely to die that year compared to those in the lowest group.
Writing in the journal Frontiers in Aging, the team said: 'This implies that a simple, non-invasive cheek swab can be a valuable alternative for studying and tracking the biology of aging.'
Other experts cautioned that this method cannot be used to predict the day or even year that someone will pass away.
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