Fewer than half of the adults who took part in the survey said they always or often use sun protection Clearer labelling is needed on sunscreens amid what has been described as a worrying lack of understanding about the protection they provide, the Royal Pharmaceutical Society said. A quarter of people did not know what the rating on their sun protection stood for, and the majority did not know that the Sun Protection Factor rating protects them from only some of the sun’s harmful rays, according to the poll.