Skin cancer risk versus the need for Vitamin D.
Apparently Cancer Research UK has recruited seventy-five healthy volunteers to experiment on. They are aged between 18 and 45 and present a range of skin colours from palest pale to darkest black.
A Photobiology Unit in Greater Manchester is to run the study.
The volunteers are going to be exposed to simulated sunlight for short periods, then samples will be taken of their blood and urine and tested for Vitamin D and DNA changes.
Also occasional skin samples to test for DNA changes.
How much sunlight are they going to get each time? Should they be worried?
It would appear not. According to the report I read, the amount will be - and I quote - "equivalent to that of a summer's day in Manchester."
In other words, not much.
That's all right then.