I love lab muffin. Good stuff. If you subscribe to Consumer Reports, their latest issue has a piece on top rated sunscreens. They tested the average spf of each sunscreen and many, actually most, tested out at much lower than advertised - think 20 spf or less for a sunscreen advertised as 50. That said, I'm not a fan of US sunscreens. I order from Amazon UK to get {hopefully) more effective product.