Our expert says:
Hi Sarah, thank you for the question.
Octocrylene is an organic compound used as an ingredient in sunscreens and cosmetics. This organic compound can penetrate into the skin where it acts as a photo sensitizer. This results in an increased production of free radicals under illumination. Free radicals are known to induce indirect DNA damage and an increased concentration of free radicals might have contributed to the increased incidence of malignant melanoma in sunscreen-users compared to non-users.
So your best approach when using a SPF is to make sure that it contains zinc oxide and/or titanium dioxide. NeoStrata’s main ingredient used for sun protection is Titanium Dioxide 2%. I cannot find the ingredients used in the Piz Buin you mentioned but please note that if you do not see titanium dioxide then be wary in its ability to protect the skin from UVA rays. The second ingredient you mentioned (methyl oxyb...) also known as Octinoxate is used for the UVB protection.
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