OldPerry
Forum Replies Created
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Depends on how much water is in your hair when you apply it. I would guess you have 2/3 shampoo and 1/3 water ratio so that means about 10% surfactant.
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@Graillotion - Perhaps I’m mistaken. It is simply a supplement so there wouldn’t be any drug restrictions.
I found it here and misread the entry.
https://medlineplus.gov/druginfo/meds/a620058.html -
I’m not sure about your question but if I understand correctly you are referring to Imidazolidinyl Urea
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The addition of the oil seems counter productive. I’m not sure you actually need it.
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UVA is responsible for most of the things that cause aging skin. e.g. collagen/elastin protein break down, melasma, etc.
While sunscreens do block most of the UV, they do not block all of the UV. So, there is still enough that gets through even if you are using sunscreen to produce all the vitamin D that you need.
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@Abdullah - fortified foods, plus there is not really good evidence that sunscreen use is correlated with vitamin D deficiency.
@DaveStone - I wear sunscreen if I’m going to be outside in the sun for a long time. But I don’t wear it all the time.
Sun damage is not a myth. Just look at the skin of people from Arizona or Florida vs people from Minnesota. If you’re not from the US these are sections of the country that are sunny (Arizona / Florida) and less sunny (Minnesota). People in sunny places have “leathery” looking skin in my opinion.
So, if you care about having skin that doesn’t look aged or weathered, wear sunscreen. Theoretically, sunscreen use should also protect against skin cancer. However, the data on this is much less convincing.
Sunscreens are not regularly added to moisturizers because it would make formulas more expensive without providing a benefit companies could claim. Also, the ingredients are drug actives (at least in the US).
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Not exactly. You see solids like skin and hair don’t actually have a pH. Only solutions have a pH by definition. When people say hair or skin have a pH what they are really talking about is the isoelectric point.
Isoelectric point is the pH at which the hair will not migrate in an electric field.
The pH of the surrounding solution doesn’t actually change the positive or negative characteristics of the hair (or skin). It just says that if you want stuff to stick to your hair (or skin) having a positively charged ion in a lower pH solution is what you want to do.
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@Bill_Toge - When I was at Alberto we had a product that made about $100,000 in yearly sales. We discontinued it because this wasn’t nearly enough to justify making it and other business opportunities seemed more appealing.
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Products are discontinued for one main reason…people don’t buy enough of it
I don’t have an alternative to recommend but look for a product that contains
PEG-4, Cyclopentasiloxane, Propylene Glycol, Dimethicone, Polyacrylamide, C13-14 Isoparaffin, Laureth-7, Phenylpropyldimethylsiloxysilicate
None of the other ingredients will have much impact on performance. -
Guess my local brewery will have to stop making it.
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@ngarayeva001 - the glove analogy breaks down because unlike skin, it is not constantly renewed.
So, it may be true that male and female skin is of different thickness, but the surface is constantly being removed and the lower layer is constantly replaced. In a system like this it is not obvious that thicker is better.
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My version haas 667 pages also.
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The way formulating works is that you take your best guess at an ingredient level. Once you get something that works, then you try making a batch with half as much. If that still works fine then you’ve optimized. If that doesn’t work quite as well, then you cut too much.
It’s an iterative process.
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I will echo @ketchito ‘s comment - don’t rely on supplier data. It is simply marketing information. They only show you data from studies that highlight the story they want to tell. They don’t show you data that conflicts with their story. Supplier studies are not science.
This isn’t to say that they are lying. It’s just that they are not attempting (as science does) to uncover what is true.
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@Abdullah - I can think of no reason it would be different than other skin.
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Seems like a reasonable amount to start. Did you try it? What did you find?
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@Syl - Welcome to the wonderful world of cosmetic claims substantiation!
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There are two things.
1. First they say “up to 95%” so that could mean 0 to 95%. It’s a pretty broad claim
2. It also depends on what they define as hairfall. They probably will say hair fall is hair breakage. Then they have a little asterisk where they likely say when used in combination with a conditioner. Then they do a robotic combing study. They count how many hairs break off with and without treatment and that works out to be up to 95% less breaking.
That’s how I would do it anyway.
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It’s a bit pedantic but it’s not exactly right to say hair has a negative charge. For example, you can cause a positive charge by rubbing your hair on something like a hat or balloon or something.
The isoelectric point of hair is negative which is why positively charged compounds stick to the surface better. The isoelectric point of skin is https://pubmed.ncbi.nlm.nih.gov/11166421/ is about pH 4.8 which would indicate that it too has an overall negative charge.
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I’m not sure it has been determined that cell turnover results from any type of skin irritation, but it seems reasonable.
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It seems some positive data is available, but not overwhelmingly convincing.
https://www.sciencedirect.com/science/article/abs/pii/S1748681517302504
The authors conclude “ The current literature does show some methodological shortcomings, and further research is required to truly establish microneedling as an evidence-based therapeutic option for treating scars, wrinkles and other skin conditions.“
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What’s the difference between this formula and your other formula that doesn’t separate?
Yes, increasing surfactant may prevent separation…or it may not. -
Good question. I think it depends on the contract manufacturer or company.
If you are making primarily new formulas, then each one will take a lot of time to develop (1 year at least). Now, that doesn’t mean you’ll be working on the same formula every day for a year but that does mean it will take that long to have a finished, stability tested formula.
If you are just taking a stock formula, changing color, fragrance, and extracts then it won’t take as long. Maybe just 4 months.
In any case, it seems reasonable that at most you could develop is
12 completely new formulas a year
52 formulas if you already have a starting formulaThat would be my guess. Making more than 2 batches a day is pushing it.
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What convinces you that derma-rolling does anything?
What is it supposed to do? -
@MarkBroussard - I suppose there are plastics you could inject that might not degrade in the body over time.