| • | prefer total (pure) physical blockers |
| • | (“pure” because, the physical blockers have a flat curve blocking the entire spectrum approximately equally, and if there is no chemical blocker in the sunblock, than it can be inferred that the SPF (which refers to UVB blocking) is entirely due to the physical block and therefore also implies the amount of UVA blocking (flat curve)) |
| • | sunscreen ingredients that provide total block (i.e. UVA and UVB): parsol 1789, zinc oxide, titanium dioxide, mexoryl |
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