TIL the vast majority of sunscreen sold in the US provides little protection against UV-A radiation, which is the primary cause of skin aging and skin cancer.

Read more: https://www.ewg.org/research/us-sunscreens-get-flunking-grade-uva-protection

What do you think?

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  1. The article linked is several years old, but as far as I can tell the facts haven’t significantly changed. Due to a mixture of over and under regulation sunscreen in the US is limited to a small list of ingredients that provide substandard UV-A protection.

    The linked article mentions that over half of the 446 reviewed sunscreens sold in the US wouldn’t meet minimum standards in Europe, and many sunscreens with high SPF will block UV-B, but provide little protection against UV-A

    To very briefly summarize UV-A vs B:

    UV-A: present year round, not blocked by clouds, penetrates deep into skin leading to long term damage and aging. Often not blocked by glass so being next to a window still leads to exposure.

    UV-B: Highest in spring to fall, blocked by clouds, does not penetrate as deeply, leads to sunburn/tanning and can increase risk of cancer, though A may be more potent for long term damage.

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