In 2007, the New Zealand Herald reported "People with moles on their skin live longer".
A study comparing more than 1,800 twins has found that those with more moles on their skin have longer telomeres - a marker of biological ageing found in all cells.
The findings suggest that the risk of cancer is counteracted by the effects of the telomeres, which protect the chromosomes.
Veronique Bataille (who lead the study) is cited, saying (emphasis mine)
This could imply susceptibility to fewer age-related diseases such as heart disease or osteoporosis. Further studies are need to confirm this.
That study was aparently published in Cancer Epidemiology Biomarkers and Prevention
Since the study itself seems to only offer the possibility of longer life for mole-bearers and since six years have passed, I wonder if there were any follow up studies or other means to harden the claim.
Nevus Size and Number Are Associated with Telomere Length and Represent Potential Markers of a Decreased Senescence In vivo