Harvard research tracking nearly 30,000 Swedish women over 20 years found greater sun exposure correlated with longer lifespans and fewer heart disease deaths. The longevity benefit proved modest, adding just 7 months to 2 years of life despite the statistical significance.

Cancer deaths were higher among frequent sunbathers, though researchers attribute this to longer survival rather than direct causation. The study couldn't establish why sun exposure might extend life, with vitamin D production being one possible explanation. Notably, the research included only women, leaving gender-specific effects unclear.

Researchers suggested limiting sun exposure might cause health harm comparable to smoking, a claim the author considers premature. The findings highlight the complex balance between skin cancer risks and potential benefits of moderate sun exposure, with vitamin supplements possibly offering advantages without UV radiation.