Non or less toxic sunscreens?
Must actually work….
Go!
Discussion
Olive oil!
To be sure mix with bit of rosemary, garlic, salt and pepper.
If it doesn't help you to keep from burning, at least you'll taste good.
non ideally, just increase exposure gradually and dont step out the door wearing sunnies. Hard if you're just doing a week or two holiday abroad going from uk winter though..