avobenzone and octinoxinate

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Learn what is really real, in an industry full of fake › Forums › Ask the Beauty Brains › avobenzone and octinoxinate

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  • March 11, 2017 at 3:47 am #92739
    el705
    Member

    I know that avobenzone is degraded by octonoxinate if they are in the same formula……

    What if I apply a day cream that has avobenzone stabilized with octcrylene..then on top of that apply a mineral sunscreen that happens to also contain octinoxinate.  
    Will my skin be protected.  
    March 27, 2017 at 12:54 am #97211
    el705
    Member

    i thought people on here were informative and could anwer questions?

    March 27, 2017 at 12:55 pm #97219
    RandyS
    Member

    I’m sorry but it’s difficult for us to answer every question quickly. I can’t answer yours without doing more research. 

    March 27, 2017 at 6:29 pm #97221
    Peter
    Member

    I guess it’s very difficult to say. A “stable” formula is only a legal term, companies don’t have to make a 100% stable formula. “To develop a sunscreen that conforms to today’s legal requirements, it is not necessary to reach 100% photostability (Wypych, 2015)”. If after 10MED still (I believe) 90% of the avobenzone is recovered, the company may claim it’s a stable formula. I don’t think the company is going to test how stable the formula is when an other product with octinoxate is applied over it. I once asked Avene and they couldn’t guarantee than the nano titanium dioxide in my powder would increase degradation of the avobenzone in their sunscreen.

    March 28, 2017 at 1:24 pm #97223
    RandyS
    Member

    Thank you Peter!

    March 28, 2017 at 4:29 pm #97226
    el705
    Member

    Ive seen brands who combine the two in the same formula, there must be a good reason because you would think they would know better.  I thought Paula Begoun once said its no problem to use both ingredients together if they are in separate formulas, but not sure

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