I have cut out seed oils and 'spreads' from my diet for the last 5 and 1/2 years and these days I do not need the factor 50 sunscreen which was the only way to protect me from excruciating pain in the summer months.
I was out today playing for morris and maypole and it was gloriously sunny. I did not use sunscreen. My skin was perfectly happy to be shone on, and having been out in short sleeves a few times now I have the beginnings of a tan, but not the slightest hint of redness.