OldPerry
Forum Replies Created
-
DMDM is a safe preservative
-
@Dtdang - Dry oil & wet oil are really made up marketing terms. And since marketers tend to use terms in the manner that best suits them, it’s fair to ask what you mean when you use the terms.
For example, this company uses the term “dry oil” when referring to their whole formula which contains water & glycerin among other things. https://www.cosmeticsandtoiletries.com/formulating/category/haircare/Verbs-Ghost-Dry-Oil-498916311.html
-
Yes, glucosides are only being used now because of the natural story you can tell in marketing. If performance was the only factor important in formulating, I doubt anyone would use glucosides either.
-
We always used plastic disposable pipettes
-
If you are selling products or the people using your products might sue you, then yes all that stuff is needed. It’s also good to do safety testing in case someone accidentally uses a product you make.
See this discussion.
https://chemistscorner.com/cosmeticsciencetalk/discussion/641/laboratory-set-up-equipment-list#latestI’d encourage you to be skeptical of “natural cosmetic workshops.” They can often be filled with misleading, erroneous information. Take particular note of who is running the workshop and whether they have any bonafide scientific background. Anybody can set up a cosmetic workshop & charge people to take it. That doesn’t mean they give accurate information.
-
My best guess is that the product does not deliver on the expected promise. But if you read the claim, it’s pretty wide open for interpretation.
“Lume blocks the ability for bacteria to consume fluids…”
It could do this in any number of ways.
-killing the bacteria
-binding with bacteria receptors
-physically separating bacteria from the food sourceor since there is no way to measure what it means to “block the ability” it could have no effect at all. Some people will just like how it feels on the skin or how it smells and believe that it’s working.
or it is indeed a fake review. I think a large percentage of online reviews are fake.
-
If you want useful answers, it would help if you listed all your ingredients. No, Polysorbate will not act as a thickener.
-
To get a useful answer you’ll need to post the ingredient list of your formula.
-
I can’t see the ingredient list in your link. Can you copy and paste it here?
-
@Doreen - well not exactly. I believe it is a weak acid so it wouldn’t be correct to claim it’s ever cationic. It either has a negative charged ion at lower pHs or it is neutral. See the structure of allantoic acid.
-
Interesting. For fragrances you typically need a 4:1 ratio of polysorbate to fragrance. But a vitamin is clearly different.
-
According to Merck, the following is true of a 5% solution in water:
pH = 4.5 - 6 (5% in water, 20 deg C)
https://pubchem.ncbi.nlm.nih.gov/compound/allantoin#section=Vapor-Pressure
-
@David - it would be nice but this is actually a common problem in all science. It’s even got a name : the file-drawer effect
This is why I am skeptical of any single study that shows some dramatic effect. There could have been dozens of studies that looked at the same compound which showed no effect and just weren’t published.
Extraordinary claims require extraordinary proof.
-
What was the answer?
-
@David - Universities would do that or maybe some governments.
I suspect all the big companies have already done this type of research and haven’t published anything. Most likely because they haven’t found something that really works.
-
I honestly think this is just a screw-up where they included some internal numbers and no one on the label review committee caught it.
-
That’s a good thing to remind people about.
Websites get ingredient lists wrong on occasion.
-
For the curious, here is a link to the mouse study demonstrating an effect of peppermint oil on hair growth. There is another study that seems incredibly similar suggesting 3 - 5% Lavender oil could have an effect.
This research is interesting, but it was done in mice which doesn’t always translate to effects in humans.
It seems weird to me that Minoxidil which only works in about 66% of people, showed 100% effectiveness in these mouse models. This shows that the research model clearly exaggerates the effect.
-
What do you want the Vitamin C to do?
-
@Stanley - Hydrogen bonding doesn’t play a huge role in relaxed hair. I was just suggesting it as a possible explanation for the question posted above.
But you can see the straightening effect of hydrogen bonding by taking a curly / wavy hair tress and getting it wet. It absorbs water which pulls the hair straighter. Hydrogen bonding between water molecules and hair protein can help maintain the shape for a short while. But as the water evaporates so does most of the effect.
To relax hair, you would need a more significant chemical change which is what you can get from Lye or Thioglycolate.
-
Hair growth is a drug product. If it works, it’s a drug. It doesn’t matter whether the materials are natural, plant extracts or advanced, synthetic compounds.
Here is the monograph for hair growth products.
The only proven ingredients are Minoxidyl and Propecia.
If you want to create a product that doesn’t work but makes you feel like it’s working follow the suggestions by @EVchem
-
I don’t know what that code is. Here are some possibilities
1. The lot number of the production run - so they can track the batch
2. The lot number of the label
3. Printing mistakeThe 695899 number may be a thing that Publix puts on its web entries. I haven’t found it in other places.
-
You can read about the absorption of Hydrolyzed Wheat Protein here.
https://www.dropbox.com/s/08bjawrpi5d9vsl/hair-protein-absorption.pdf?dl=0The bottom line is this: Hydrolyzed protein can penetrate the hair and it doesn’t matter much which one because they all will to some extent. BUT you’re not going to see any noticeable impact on the important characteristics of the hair like combing, manageability, split ends, etc. The effect of cationic surfactants and silicones will overwhelm any impact you might see from proteins.
-
I believe any surfactant that can create micelles has the potential to be an emulsifier. In fact, SLS works as a detergent because it “emulsifies” the oils that are on the surface of hair and skin. It’s just that there are better options because (among other things) SLS is irritating and not something you want to leave on the skin for long.