First off, with the number of filters in the sunscreen I’ve seen some influencers confidently say that you need more filters for so called “redundancy”, that every sunscreen needs to have more than two filters to give you a high SPF. The reality is that consumer groups frequently test all types of sunscreens, and in many cases, they have a lower SPF than their label indicates. For example, in 2016, 23 out of 60 tested sunscreens from the U.S. had less than half the SPF that was labeled. I actually got to talk to some of the top people in Neutrogena’s sun R&D team about their sunscreen development process. Neutrogena’s Helioplex sunscreens have to keep over 85% of their UVA protection after five hours of exposure to a midday sun lamp. If it’s 84%, they just won’t release it. They also test the wear of their sunscreens under all sorts of conditions, including extreme heat and extreme cold. The problem with this idea is that Western sunscreen brands haven’t really been aiming for this sort of formula. There just aren’t that many sunscreen nerds in Western countries that wear sunscreen every day. There are a lot of things in my suggested list that aren’t compatible with each other ,or aren’t compatible with your life, so there’s going to have to be some compromise.

PURITO Daily Soft Touch Sunscreen 60ml / 2.02 fl. oz. SPF 50 PURITO Daily Soft Touch Sunscreen 60ml / 2.02 fl. oz. SPF 50

Pissavini M, Tricaud C, Wiener G et al., Validation of an in vitro sun protection factor (SPF) method in blinded ring‐testing, Int J Cosmet Sci 2018, 40, 263-268. DOI: 10.1111/ics.12459Butylene Glycol (Skin-Conditioning Agent), Methylene Bis-Benzotriazolyl Tetramethylbutylphenol (Ultraviolet Light Absorber), Glycerin (Humectant),

PURITO | YesStyle PURITO | YesStyle

Overall, American and western brands are heavier, and they are more suited toward outdoor use and use when you’re engaging in a lot of activity like swimming. In the month-plus since INCIDecoder’s blog post, Purito, Klairs, and Keep Cool have taken action. Here is what each brand has done in response to the controversy: PuritoThere’s also the cost of the sunscreen ingredient. If you want to cover the whole spectrum with one or two filters and you don’t want to go with a mineral sunscreen, then you pretty much have to use some of the newer broad spectrum filters. In short, SPF measures how much protection you get from erythemal or sunburn-causing UV from a sunscreen, or any other product. Tocopherol (Antioxidant), Ceramide NP (Skin-Conditioning Agent), Dipropylene Glycol (Solvent), Cholesterol (Skin-Conditioning Agent), Propylene Glycol (Solvent), Xanthan Gum (Viscosity Agent), In one of the INCI Decoder tests they only use five results, and both tests weren’t consistent enough to be used on an SPF label. But these tests are in vivo and they largely use the same procedures, so I don’t think that affects their ability to raise doubt over an SPF label claim. The best method so far seems to be the Cosmetics Europe method. Very briefly, this uses a robotic arm (attractively named the Spreadmaster) to spread the sunscreen on two different specially roughened plates. They take four different UV absorbance readings, then they put it all into an equation that calculates the SPF.