what spf should be used daily
Dermatologists recommend using a sunscreen with an SPF of at least 30, which blocks 97 percent of the sunâs rays. Higher-number SPFs block slightly more of the sunâs rays, but no sunscreen can block 100 percent of the sunâs rays. Currently, there is not any scientific evidence that indicates using a sunscreen with an SPF higher than 50 can protect you better than a sunscreen with an SPF of 50.