Not all sunscreens are created equal and in many cases sunscreen is harmful, not helpful.
-Mineral sunscreens typically include ingredients like zinc oxide or titanium dioxide, which create a physical barrier to protect the skin from the sun
-Chemical sunscreens use one or more chemicals including oxybenzone, avobenzone, octisalate, octocrylene, homosalate and octinoxate.
If sun exposure is a big concern for you or you have a family history of skin cancers, the safest option is to avoid the sunscreens that the EWG has said might contribute to skin cancer and use the safest form of sun protection: covering up.
It is important to be responsible with sun exposure, but many sunscreens offer a false security of sun protection and may do more harm than good.