![]() Furthermore, the dispersion and type of iron oxides (particle size, and did you know some commercial iron oxides can be transparent?) play a role. The body of research tends to point at a minimum of 3.5-5% of iron oxides for a protective impact. Sergio Schalka MD investigates how PPD and UVA-PF values have a very weak correlation with Visible Light protection and how not just any iron oxide containing formula is protective (not all of them are equal): The work of the great Photodermatologist Dr. Here is a study that compares a sunscreen ( Octocrylene, Avobenzone, Tinosorb M, Tinosorb S) that comes in a tinted (inclusion of iron oxides and pigmentary TiO2) and non-tinted version along with the non-tinted plus conventional makeup on melasma patients: With regards to thinking of UV filters that also offer Visible Light protection, it is known that the incorporation of just one or two UVA filters isn't necessarily enough for things like Visible Light induced pigmentation. Red 33 is a dye and different from red iron oxide. Out of the three, black iron oxide is the most protective but nobody should obsess over that fact. A combination of red, yellow and black plus pigmentary Titanium Dioxide can create various shades of beiges and browns mimicking human skin tone. Iron oxides are more well studied in the visible light region because they are more accessible to study (no patents). But they have not been studied in head to head comparisons. From the data I've seen at specific concentrations, Tinosorb M, Tinosorb A2B and Triasorb have a very similar plateau 380-420nm. Avene is using a lower percentage of Triasorb than the data submitted too. No one knows for sure right now because there isn't a lot of transparent information about Triasorb available and there is only one commercial product with it as you mentioned. I don’t know if this colorant protects against visible light. The only colorant I see listed is Red 33. This new sunscreen doesn’t seem to have any iron oxides in the formula, unlike the tinted versions of sunscreens with Tinosorb M. ![]() So, does this mean that Tinosorb M is better than TriAsorB at protecting against UVA 1 and HEV light (blue light)?Īlso, iron oxides help protect against visible light. It is said that, in order to protect from visible light, the sunscreen also must be visible. Tinosorb M is more opaque and leaves more white cast. So I was wondering if TriAsorB is better than TinoSorb M in this aspect. ![]() It's more elegant than previous Avène products with Tinosorb M.īut the main reason I wear sunscreens is to prevent photo-aging, which is caused mostly by long UVA (UVA-1) and HEV (high energy visible) light. ![]() It's been the best sunscreen I've tried so far: nice texture, no white cast, no one can tell that I'm wearing a sunscreen. I bought the new sunscreen Avène Intense Protect with the new filter TriAsorB and I love it. Posts without a valid tag will be removed by Automoderator. Megathreads HG threads No/Low Buy threads Routine megathreads Referral threads Research threadsĪsking a question? Check out our Daily Help Thread! SkincareAddiction FAQ How to post About us Verified flair Related subs More Help Routine order Expanding your routine How to patch test Shaving Reduce, Reuse, Recycle Mental healthĭiscussion day (text-post only) & No/Low Buy ThreadsĬasual Friday (Humor, Cringe, Selfies, B&As are allowed General Chat) Skincare Core ▹▹ The ScA Routine ◃◃ Cleansers Moisturizers Sunscreen ▹▹ Search the sub ◃◃Įverything.on Skin Concerns (acne, PIH, and more!). Don't spam your blog, your product, your anything Quick Links Valid Title Tags COVID-19 Megathread RulesĤ.
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