Abdullah
Forum Replies Created
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@Microformulation
What percentage minimum and maximum salicylic acid and lactic acid are OTC? In separate products.I was thinking 0.5-2% salicylic acid is OTC.
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@Microformulation thanks
What about salicylic acid?
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@PhilGeis this study is interesting.
What are the best ingredients or antioxicants for Oxidative stress to apply from a leave on product for scalp?
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Just use BTAC. The reason has been told in another discussion.
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@PhilGeis i was asking how to communicate a product benefit.
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Yeah we are discussing the same ingredient.
Because it works better at this ratio than what you said in shampoo.
What is the product?
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@Perry 1% cetrimonium chloride which is 0.3% cationic surfactant?
Was there another silicone or cationic surfactant in this product?
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What is the composition
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DaveStone said:Abdullah said:@Perry isn’t it simple. No exposure to sun, no vitamin D from sun.
As much as i know black people have better skin than white people and black people expose their skin more to sun than white people.
Vitamin D doesn’t have to come from the sun. You can get it through a multivitamin or fortified foods as Perry said. Even milk has some Vitamin D.
yes you can but Don’t you sometimes think that sun may have more benefits other than vitamin D that we would discover in the future?
I’ve read that Vitamin D can’t pass through windows. You have to be outside to get it, and many people don’t have the opportunity to do that regularly.
yes. Vitamin D is made by help of UVB directly hitting the skin.. Window blocks UVB. Your SPF sunscreen blocks UVB. So if you are inside then what is the benefit of applying SPF sunscreen? There isn’t UVB at first place.
aging is caused by UVA. Window doesn’t block UVA, your SPF 50 doesn’t block UVA. So what is the benefit of using SPF 50 or not going in sun for preventing fast aging caused by UVA?
People likely got a lot more Vitamin D 100 years ago.Black people have better skin supposedly because of their higher melanin. It better protects against photodamage.
may be. may be it is because they don’t protect themselves from sun like white people do.Although lines/wrinkles/spots are only one part of skin aging. Sagging is the other…and that has to do with collagen and elastin loss.
in my experience being inside building all the time makes my muscles and skin weak and saggy even if i take vitamin D supplements. Going in the sun naked daily specially mid day gives me muscle energy and my skin feel better. Although morning sun makes me tired ????.Melanin isn’t related to that, at least I don’t think. This article explains it pretty well: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4756870/
@davest@DaveStone
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@Perry isn’t the purpose of sunscreen and SPF blocking UVB not UVA?
You can use SPF 50 every two hour without blocking UVA that causes aging. Then what is the benefit?
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@Syl good information
Appreciate it -
@PhilGeis good point but how you claim and support it is very important especially in a product that doesn’t do what people think it does for example reducing hair fall by shampooing it.
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Thank you all
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@Perry isn’t it simple. No exposure to sun, no vitamin D from sun.
As much as i know black people have better skin than white people and black people expose their skin more to sun than white people.
What causes the skin look aged from sun exposure? UVA or UVB or something just light or something else?
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Where did you read that?
I think good ratio is 1:10 DEA: SLES
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If you use sunscreen everywhere Everytime, when and how would you want to get vitamin D?
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Sometimes manufacturer just change the name, color and scent and call it a new product. If this new product sell better because of its story then they discontinue the previous one because they know these two are the same thing.
So you can ask the manufacturer what alternative do you have for this product. See if that alternative also has the ingredients that Perry mentioned.
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@Isabella9667 you mean mix it well before each use and don’t sell it?
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It is not cold processable.
It is not inexpensive. Price is 7x more that phenoxyethanol and 2x more than Paraben.I think it will be very popular in the future.
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@zetein how? Can you explain a bit!
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@vitalys and what is that barrier doing?
For example if the barrier is attracting water we call it humectant.
If the barrier is preventing water loss we call it occlusive.What should a barrier do to call it skin protectant?
If protection then protection from what? -
@zetein exactly
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@Perry so these surfactants will stick better to skin at which pH?
Cationic surfactants at pH pH 5.5 or 4?
Anionic surfactant at pH 5.5 or 4?
Or does anionic surfactant stick to skin by electric charge at any pH or not at all?
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@Syl maybe for a few months
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@ketchito Yes what you said is correct. But my main question was what is the definition of skin protectant and what should an ingredient be able to do to call it a skin protectant.
Any comments on this!