I thought you ladies might find this interesting re SS ROP

I did a review on Amazon (an abbreviated version of my MUA review) of Bioderma Photoderm Max SPF 50 back on 07/18/11 and in that review, I mentioned that while I love for my body, I wasn't going to use on my face due to avobenzone present since my MU and my MMU contain zinc oxide and titanium dioxide.

On Monday, 07/09/12, I received the following comment posted:

Posted on Jul 9, 2012 2:49:14 PM PDT Jessica Allison says:
For anyone wondering about why Avobenzone would be a negative when used with titanium dioxide and zinc oxide, I believe that (insert my name here) is referring to a 2001 study that showed that Avobenzone (listed on ingredient labels as BUTYL METHOXYDIBENZOYLMETHANE) breaks down in the presence of mineral sunscreens.

After doing a bit of research, it seems that that this study (conducted by a cosmetics raw-materials manufacturer) has not been duplicated, and does not seem to have been published or submitted for any type of peer-review in the decade since it was presented. Thus, it's validity is questionable (I actually found some errors in the write-up itself).

This is all mostly a moot point anyway because after speaking to industry insiders, I've learned that modern cosmetic grade titanium dioxide is coated to prevent such interactions. I spoke to renowned beauty expert Paula Begoun on Twitter about the subject and in her words "coated/encapsulated SPF ingredients are as common seat-belts in cars (using non-coated would be extraordinarily strange!)" Aside from this, the Tinosorb and octocrylene in the formula are both effective photostabilizers.

So, scientific jargon aside, this is a well-formulated product, which I would be absolutely comfortable putting under makeup or any other mineral-containing product.

any thoughts/comments? Sorry for the long post...:)

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