I wore nothing last Saturday and paid the price. My chest and back were one solid, awful burn. Beef tallow has been helping restore my skin better than anything else I've ever used. 

This was my own fault since I hadn't exposed those areas to the sun much and should have eased into it by wearing a shirt most of the day. 

I still have a lot to dig into about the junk in most sun screens, but I think they're well be a few that I could buy or make that would be effective without having too much junk in them. But 100% yes on beef tallow!