![]() Lastly, it's also important for us to check that the sunscreen filters are photostable, because over time, some sunscreen filters can interact with and destabilize each other. The sunscreen also has two antioxidants - BHT, which keeps the product stable, and Tocopherol, or Vitamin E, which also helps to combat the oxidative damage from UV and IR rays, in addition to also keeping the product stable. I confirmed with Daylong that the combination of filters in Daylong Sunscreen has been tested as a whole to protect against IR radiation. They may also contribute to " accelerated skin ageing and.the development of cancer". When that happens, IRA waves can cause " oxidative damage" and " adverse heat effects on skin". The difference between the various types of IR rays and UVA and UVB waves is the wavelength: UVA rays have wavelengths of 320–400nm, UVB rays have wavelengths of 290–320nm, while IRA rays have wavelengths of 760–1440nm, IRB rays have wavelengths of1,400–3,000nm, and IRC rays have wavelengths of 3,000nm–1mm.Ĭetaphil Daylong Sunscreen SPF50+ PA++++: The combination of filters used is also photostableĪs far as sun protection goes, we are primarily concerned with IRA rays, because IRB and IRC waves " are completely absorbed at the epidermis or only marginally affect the dermis", whereas IRA waves " are capable of penetrating human skin and directly affecting cells located in the epidermis, dermis and subcutis". There are three types of IR rays - IRA, IRB, IRC. ![]() IR rays, like UV rays, are emitted by the sun, and IR rays consist of a third of solar emissions. I also want to talk a bit about IR rays, because they're a fairly new area of exploration in the scientific literature, and as such are not as established in common wisdom as UV rays. So the combination of filters ensures that you indeed do get coverage across the full spectrum, which is good. Titanium Dioxide covers both UVA2 and UVB rays, while Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine and Methylene Bis-Benzotriazolyl Tetramethylbutylphenol both cover UVA1, UVA2, and UVB rays. Ethylhexyl Methoxycinnamate and Ethylhexyl Triazone cover UVB rays, while Diethylamino Hydroxybenzoyl Hexyl Benzoate covers UVA2 rays. And indeed we do see that the filters do cover the entire spectrum. Of course, since this is a sunscreen, it's important for us to check that the sunscreen filters do indeed cover the full spectrum of UV rays, including UVA1, UVA2, and UVB. Then there are also ingredients such as emulsion stabilizers (Cyclodextrin), antioxidants (Tocopherol aka Vitamin E, BHT), skin conditioning agents (Polyglyceryl-2 dipolyhydroxystearate), anti-caking agents (Silica), emulsifiers (Decyl Glucoside, Lauryl glucoside), pH adjusters (Triethanolamine), thickeners (Xanthan gum), and chelating agents (Trisodium Ethylenediamine Disuccinate).Ĭetaphil Daylong Sunscreen SPF50+ PA++++: A variety of UV filters ensures broad spectrum protection The ingredients in the Daylong Sunscreen are water, UV filters (Ethylhexyl Methoxycinnamate, Diethylamino hydroxybenzoyl hexyl Benzoate, Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine, Titanium Dioxide (Nano), Ethylhexyl Triazone, Methylene Bis-Benzotriazolyl Tetramethylbutylphenol), solvents which dissolve and disperse the UV filters (Alcohol, Propylene Glycol), emollients (C12-15 Alkyl Benozate, Dibutyl Adipate, Dimethicone), and film formers which help to make the product more water-resistant (VP/eicosene copolymer, Acrylates C10-30 Alkyl Acrylate Cross Polymer). As always, we'll start by looking first at the ingredients in the sunscreen - particularly at the UV filters, which are responsible for protecting skin from the sun!Ĭetaphil Daylong Sunscreen SPF50+ PA++++ Ingredients So as you can tell, we've got a lot to cover in this review. Don't worry if this sounds confusing - we'll be taking a look at it later in this review!Ĭetaphil Daylong Sunscreen SPF50+ PA++++: Like Cetaphil, the focus is also on products that work without behing harsh ![]() It doesn't just claim to provide broad spectrum protection against both UVA and UVB rays, but also against IR rays, or infrared radiation, which like UV rays, is also emitted from the sun. I'm a huge advocate of using sunscreen regularly - in fact, one of the most popular posts on my blog is a post on sunscreen tips! So of course I was excited to try this out, and see how it performs. I have the Cetaphil Daylong SPF50+ Gel, which also has a PA++++ rating, one of the highest I've seen on sunscreens recently. Cetaphil Daylong Sunscreen SPF50+ PA++++: Sunscreen targeted to be effective, while suitable for sensitive skin ![]()
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