Peter

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Peter
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  • The amount of UVA protection is actually measured in a lab, according some pretty strict rules. The UK has a boot rating system, Asia the PA rating system, US the critical wavelength and Europe the 1/3 rule (which has been used for quite some years …
  • Sodium Coco Sulfate consists for a large part of Sodium Lauryl Sulfate. 

http://www.hebebotanicals.co.nz/sodium-coco-sulfate-another-synthetic-detergent/
  • It can depend on the kind of Titanium Dioxide and Zinc Oxide that has been used, so a difference in particle size and different particle coatings. Other ingredients can boost the spf level as well, like certain polymers or antioxidants. Also how wel…
  • Matrixyl is a tradename for a peptide complex. Every company mentions the concentration of the tradename Matrixyl. It's a premixed sollution and simply not a single active. So also for the 10% Matrixyl, it's not the concentration of peptides. It's t…
  • @pazzaglia 

Did you write the comment on beautypedia, that the Buffet percentage vs weight is incorrect then? Actually officially ingredients are almost always listed as percentage by weight, exactly how the Ordinary does it. The Bu…
  • Some water molecules simply have enough kinetic energy to break through the water surface. It's even possible at freezing point. Maybe you can search for the graph by Boltzmann, there are also a lot of answers if you search on google "evaporati…
    in Evaporation Comment by Peter April 2017
  • Water also evaporates from the earth surface, while it's not at boiling point.
    in Evaporation Comment by Peter April 2017
  • @patrickBOOTH 
Science says otherwise. All the studies on high pH soaps and skin cleansers say it's disrupting your fatty acid layer and it also alters the skin microflora. After your rinse it of the high pH has disrupted this whole balance.…
  • At the moment I use a surfactant free cleansing milk or just a regular moisturizer for shaving. If you search for the ones that provide a kind of slippery layer, they are okay. But well, I can imagine there is some kind of scientific reasoning behin…
  • 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% ph…
  • @MelissaMary I think it's better to look at an alternative Glycolic acid product, this one contains Alcohol, Hydroxyetylpiperazine Ethane Sulfonic Acid, Propylene Glycol, Parfum, Limonene, Hexyl Cinnamal, Linalool and Benzyl Salicylate, all these in…
  • These 3 options might help as well: http://www.codecheck.info/product.search?q=guar+hydroxypropyltrimonium+chloride&OK=Suchen http://www.cosdna.com/eng/ed8b317760.html google.com
  • @preciousia At least fragrance isn't beneficial for skin I think, and there are some negative articles about it: "While on the shelf or in the warehouse,
limonene breaks down to form potent sensitizers (Karlberg 1997; Topham 2003)"…
  • Well I know you can see Fascia when you prepare chicken for dinner, but I've never seen any prove stimulating it helps in any way.. You can also have "bindweefsel" (dutch word for Fascia) massages at some cliniques, but I really don't unde…
  • @RandyS What do you think? Is it better to store a cosmetic product in the refrigerator to decrease degradation of actives? Why does Paula's Choice say you should never store a product in the refrigerator because it can degrade the actives, while ot…
  • I want to keep my products in a fridge as well, at about 10 degrees. In the summer months it can be over 35 degrees here, and I don't believe such high temperatures in a humid bathroom are beneficial for the active ingredients. But I do wonder why P…
  • But there is a possibility that its best to store a separate ingredient at 4/5 degrees, but a formulated product not. Companies add stabilizers, and well according Paula's Choice, a very low temperature may mess up that stabilized formula. So I real…
  • Yep, I'm the same person ;-) Well to me it looks like an incomplete inci list, or it's not listed according the official inci rules. Most of the extracts and actives are powders, so considering the site says it's a gel, there must be water or some o…
  • Looks like a great product with many different actives, but I wonder what the whole INCI list is. I don't see any solvents to keep the actives suspended. According Paula's Choice Daucus Carota extract may be irritating, I found some studies certain …
  • @RandyS But Randy what do you think, some companies are really against fragrance, saying it's irritating to skin and that it can increase hyperpigmentation, but when I start searching for articles on NCBI most are talking about the high risk of alle…
  • A pH between 4 and 5.5 is good, but anything below 6.5 is fine I believe. Those yellow pH-meters work very well as well, it's easier to read than litmus pH strips.
  • I don't think it's marketing, there are a lot of studies indicating a cleanser with a pH that is close to the pH of skin is better. Although it also depends on the kind of surfactants used and refatting agents. But for the Cosrx it's kind of marketi…
  • @Preciousia BASF Sunscreen Calculator: That's very inaccurate because it doesn't take into account spf booster ingredients, like I explained. It's just a theoretical calculation. Coola has 3.2% Titanium Dioxide and 1.8% Zinc Oxide, but it's also rat…
  • @Tiffany60 I don't know about the texture and how it feels, but the ingredients look good. You don't have the nice actives like the Cerave one, but probably this one will give a better UVA coverage. It does have a small amount of alcohol, so you nee…
  • @preciousia Concentrations of titanium dioxide and zinc oxide doesn't tell you very much about the SPF level. Other ingredients can boost the SPF level, like film formers or certain coatings. For example Butyloctyl Salicylate and Polymethyl Methacry…
  • I'm always a bit skeptical on these kind of products. There's also Redensyl, which increases hair growth, comparable to 3 hair transplants surgeries....mmm...just by Dihydroquercetin and EGCG. If that would be true, why would people still be taking …
  • Sometimes I think I'm going to stop writing all the things I've found in literature. People on reddit mainly want to follow their own way, so it is hurtful if you've been reading and researching something and other people simply downvote everything …
  • The Glycerin I have is very thick, much more viscous than the Aloe Gel. But do you think it's bad when your face is wet and you rinse it off immediately? I'm a bit worried about the sensitization to Aloe, Anthraquinones can form free radicals as wel…
  • @ Preciousia But I don't care for the Aloe Vera, I only want a good slippery shaving kind of gel. After shaving I rinse it off, so beneficial ingredients don't even work. So 99% or 3% Aloe I don't mind, if a pure silicone gel works I would choose th…
  • My tetra-c is almost empty and I really want to try the high adherence primer.  Today I bought Aloe Vera Gel and pure Glycerin, as alternatives for shaving cream. Tomorrow I'm going to test if it works better than the cleansing milk I have been usin…
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