People who commit suicide tend to have shorter telomeres and excess mitochondrial DNA. While these changes are not likely to be responsible for them committing suicide, they instead could serve as a biomarker for risk of suicide.
chromosomes
Ladies, if feeling older than you look appeals to you, take a seat while you read this: A recent study found that women who sit longer than 10 hours a day, combined with low physical activity, have cells that are biologically older — eight years older to be exact — than their actual age.