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Photostability of sunscreens?
  • Ally E.Ally E.
    I have been reading old posts on this forum and I have noticed some members are always talking about photostability of sunscreen ingredients in products. Could someone please elaborate? What does it mean and what ingredients apart from zinc dioxide/titanium dioxide you'd recomment to look for?
  • mo
    Hi Alla,

    Photostability:
    http://www.biomedcentral.com/1471-5945/7/1

    Titanium & Zinc Oxide are physical sunscreens, they work by reflecting back the light.
    There are a lot of chemical sunscreens that absorb the light & break it down.

    Mexoryl is a patented Chemical sunscreen owned by the L'Oreal Group. It is quite photostable & offers good UVA protection, unlike most other sunscreens.
    The other usual suspects are Avobenzone, Octyl methoxycinnamate etc.


    Tinosorb is highly recommended for sensitive skin and is the most photostable.
    It is not yet available in the US I guess. But it is available in Europe & India.
    http://en.wikipedia.org/wiki/Bemotrizinol

    I buy a Stiefel Sunscreen caled "SpectraBan Sensitive" with Tinosorb.
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