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Fri Mar 13, 2009 12:58 pm  |
My boss wants to know if you applied glycerin to your body and went to a highly humid area (say the desert) would the glycerin pull the moisture from your body.
Shes asking because she read glycerin pulls the moisture from wherever the moisture comes from. So if it pulls moisture from the air to the body I guess she wants to know if it work teh other way around??? |
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Fri Mar 13, 2009 1:27 pm |
| mb935 wrote: |
My boss wants to know if you applied glycerin to your body and went to a highly humid area (say the desert) would the glycerin pull the moisture from your body.
Shes asking because she read glycerin pulls the moisture from wherever the moisture comes from. So if it pulls moisture from the air to the body I guess she wants to know if it work teh other way around??? |
Hyaluronic acid definitely works that way, but I don't know about glycerin.
The desert is dry, so it would pull moisture from the skin. In a humid place (like a tropical rain forest) it would pull moisture from the air. |
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No longer answering PM's due to numerous weird messages. |
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Fri Mar 13, 2009 3:32 pm |
That is absolutely true! It is a common mistake that many cosmetic formulators fall victim to when creating "moisturizing" products.
Glycerin is a humectant, and a very good one at that. It draws moisture to itself. When used in very small amounts in a formula, and when teamed with other moisturizers liked hydrolyzed jojoba esters, it can help create a 24 hour moisturizing product. An example: Gold Bond Ultimate Healing Lotion.
BUT...when added in an excessive amount to a formula with the mistaken idea that it will be a "better moisturizer", it can actually dry your skin out even further. It will draw moisture right out of your skin.
Be wary of "Moisturizing" products that use too much glycerin. They can, and will, dry your skin out further.
John |
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President and Chief Formulator, Never Over The Hill Cosmetics, Patend holder, Award winning cosmetic chemist, neveroverthehill.com, Age 51 and staying young forever! |
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Fri Mar 13, 2009 4:10 pm |
Glycerin is a humecent, it pulls moisture from the air or lower levels of the skin to the surface to your skin.
If you are in a dry area, like the desert, it will likely be very drying. Its not recommended to use 100% glycerin alone. |
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Fri Mar 13, 2009 4:39 pm |
It's usually best to be at 4.0% or less loading of glycerin in any type of personal care product.
John |
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President and Chief Formulator, Never Over The Hill Cosmetics, Patend holder, Award winning cosmetic chemist, neveroverthehill.com, Age 51 and staying young forever! |
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Fri Mar 13, 2009 9:12 pm |
That may actually explain part of the reason why I have extreme dryness when using the STOP....the top ingredient in the treatment gel is glycerin. 
I don't treat my lips with the STOP unit, but some gel always gets on them...and they end up peeling for at least a week.  My home is quite dry because I keep the a/c at about 70 degrees around the clock, so it would make sense that it is pulling moisture from my lips. |
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No longer answering PM's due to numerous weird messages. |
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Sat Mar 14, 2009 4:04 am |
| Given that the STOP device is giving off heat and warming the skin - therefore making it slightly damp, what would be the effect of the glycerin in this scenario? |
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Born 1950. There's a new cream on the market that gets rid of wrinkles - you smear it on the mirror!! |
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Sat Mar 14, 2009 2:43 pm |
That is a very nice link amonavis. I agree with almost everything that is in the info provided.
They did neglect to mention that both wax esters, and squalene are significant contributors to overall skin moisturization.
The overall profile of skin moisture agents (also known as sebum) is approximated by:
30.1% Free fatty acids
15.6% Squalene
27.7% Wax Esters
1.2% Cholesterol
27.7% Cholesterol Esters
very small amount of Ceramides
The best source of fatty acids, with the most similar fatty acid profile to the skin is Macadamia Oil.
Jojoba Oil is the one and only botanical based liquid wax ester.
And...Glycerin is indeed a humectant, but it is not an occlusive. Glycerin is readily soluble in water. Occlusives work by trapping or blocking moisture from leaving the skin. Occlusives are never soluble with water. Glycerin is not an "oily substance" as stated in the article, it is water soluble, not an oil. Try mixing petrolatum in water....won't go in will it? And by the way, the very best occlusive agent proven in clinical studies is jojoba esters, followed by petrolatum. But, getting back to Glycerin, in all the occlusive studies I've seen, Glycerin ranks at or near the bottom, since it freely mixes with water, it certainly doesn't trap it. Water, can flow in....or out of a glycerin based forumula depending on relative humidity, temperature conditions, and the load level of glycerin in the product.
John |
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President and Chief Formulator, Never Over The Hill Cosmetics, Patend holder, Award winning cosmetic chemist, neveroverthehill.com, Age 51 and staying young forever! |
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Sat Mar 14, 2009 3:47 pm |
| OK I guess Dr Baumann, director of the cosmetic medicine and research institute at the University of Miami, and professor of Dermatology, is wrong. |
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Sat Mar 14, 2009 3:56 pm |
There are many members of the Society of Cosmetic Chemists, and International Society of Cosmetic Chemists world wide that would be willing to debate this topic with her.
Humectants and Occlusives are mutually exclusive items, especially when talking about glycerin. It's like saying white and black are the same.
John |
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President and Chief Formulator, Never Over The Hill Cosmetics, Patend holder, Award winning cosmetic chemist, neveroverthehill.com, Age 51 and staying young forever! |
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