People with fewer qualifications are prone to age more quickly, a study which looked at 400 men and women says.
DNA evidence suggests cellular ageing is more advanced in adults with no qualifications compared with those who have a university degree
Those from poor backgrounds are more likely to smoke more, take less exercise and have less access to good quality healthcare, compared with more wealthy people.
They also speculate that well qualified people might be under less long-term stress, or be better able to deal with stress.
Professor Andrew Steptoe, from University College London, who led the study, said: "Education is a marker of social class that people acquire early in life, and our research suggests that it is long-term exposure to the conditions of lower status that promotes accelerated cellular ageing."
Professor Steptoe's team took blood from more than 400 men and women aged between 53 and 75.
They then measured the length of sections of DNA found at the ends of chromosomes.
These sections - called "telomeres" - cap chromosomes, protecting them from damage. Shorter telomeres are thought to be an indicator of faster ageing.
The results showed that people with lower educational attainment had shorter telomeres, indicating that they may age faster.
They also indicated that telomere length was not affected by a person's social and economic status later in life, as was previously thought.
http://www.bbc.co.uk/news/health-13345620