If we are wearing more sunscreen, why are skin cancer rates still increasing? According to specialists, most people wear chemical sunscreens that do not block all UV rays. We love what Allure says about sunscreen use in this article. Mineral blocks (Zinc Oxide and Titanium Dioxide) and physical protectors (hats, shirts, etc.) are the best ways to protect against both UVA/UVB rays. Take a look at this article for the science behind the way UV rays cause skin cancer and expert sunscreen tips.