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Last Post: 10:28:06pm, 07/01/2022
discodancer77 posted...
Theres a rate of diminishing returns where more spf doesnt really do anything for you beyond a certain point, but I forget the threshold. Google it
The SPF factor is basically the proportion less of UV you'll get from the Sun. SPF 30 blocks 96.7% of UVB light, so you can stay in the Sun 30 times as long as with no sunscreen. SPF 50 blocks 98% of UVB. SPF 100 blocks 99%.
It's also good to get one that blocks a higher proportion of UVA light too.