How many studies support Sunlight Exposure?

A widely discussed Swedish cohort study found that women who avoided sun exposure had higher all-cause mortality than those with high sun exposure, and a more recent UK Biobank analysis similarly found higher ultraviolet light exposure associated with lower mortality — provocative findings that run counter to standard sun-safety messaging, though they come from observational cohorts that cannot rule out confounding (people who avoid the sun may do so because they are already less healthy or less physically active). That's backed by 5 published studies in Vitaebase's database, including 3 meta-analyses, the most recent from 2025 -- a modest but real research base.