| Author | Message | ||
     wookster New member Username: Wookie Post Number: 148 Registered: 07-2006 |
That is the question. Can induced hair shedding through excessive washing of the scalp dermis with surfactants like SLS and high temperature water cause faster hair cycling and premature miniaturization - senescent thinning? Areas of high density hair growth like the top of the scalp have smaller sweat glands. But notice that people with advanced baldness often sweat profusely in the balding areas... | ||
| Klaas H New member Username: Jkkezh Post Number: 91 Registered: 08-2006 |
Sweat glands have the highest 5-ar activity in the entire skin. Interesting article about hairloss and sweatglands: http://www.bio.net/bionet/mm/mol-evol/1996-November/005012.html | ||
| Klaas H New member Username: Jkkezh Post Number: 92 Registered: 08-2006 |
Why do we have apocrine and sebaceous glands?
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=1281456 What regulates sweat glands? * Hormones, * Pyrogens (bacterial toxins), * Physical activities, * Emotional stimuli, * Temperature | ||
| Tom Hagerty Moderator Username: Admin Post Number: 3205 Registered: 01-2003 |
Klaas: This is a quotation from the article you linked to: "Since I think human evolution is mainly the result of the increased testosterone in us, I must be able to show that hair loss is due to increased testosterone and that sweat glands are a target tissue for testosterone." This man has a theory, specious at best, and now he has to make the facts fit his theory. He doesn't even have a hint of the naiveté of his statement. I fixed up the quotation of your message. You have to use the backslash - \quote - like
You asked why you couldn't edit your message. Only I can edit. If everyone could edit it would be a mess. For example, someone could edit your message in a way that you might not like. | ||
| Klaas H New member Username: Jkkezh Post Number: 94 Registered: 08-2006 |
Thanks for editing that Tom, I only realized my mistake as I was pressing the "post message" button, then it was too late. By the way can't you allow editing by the author? It's on most other forums. And I agree the theory from the article might be a bit silly, I should have read the article more thorough before posting. I looked mainly at the references which seemed interesting at first. | ||
| jpj New member Username: Jpj Post Number: 296 Registered: 07-2006 |
One shampoo a day is plenty in my opinion. Im not a no-shampoo guy by any means, but once a day is plenty. As a matter of fact, every other day if you dont have alot of oil one your scalp should be fine. Sebum secretions can be altered with topical anti-androgens like spironolactone and internal alpha five type one anti-adrogens like Merk's MK386 (lessens sebum, but has little effect on hairloss). Bryan Shelton posted the results of a sebum measurement study that tested people with androgen insensitivity syndrome, children, women, people with alpha five reductase type two deficiency (who never bald). Guess what? Children and people with AI-syndrome have almost NO SEBUM at all. And they have beautiful hair. People with five alpha reductase type two deficiency have just as much sebum as any other adult males..............and they never bald or even receed. Women have less sebum than men (about two thirds to three fourths as much) Men have the most...............and go bald or have some baldness eighty percent of the time at age 80. Conclusion..................YOU DONT NEED SEBUM AT ALL to have beautiful hair. You dont need alpha five reductase type 2 created DHT to have beautiful hair, but you can have PLENTY of alpha five reductase type one like that is in your sebaceous gland, and still not go bald. Info like Bryan posted with charts recorded by professional scientists slam doors shut on needless speculation. | ||
| wookster New member Username: Wookie Post Number: 150 Registered: 07-2006 |
Don't forget the aquatic ape hypothesis, which could point towards a mechanism of hair shedding due to excessive water exposure on the scalp... http://en.wikipedia.org/wiki/Aquatic_ape_hypothesis
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| jpj New member Username: Jpj Post Number: 297 Registered: 07-2006 |
Wook, if water exposure causesd human baldness, females would be going balder than males because they shower every single day pretty much without exception and have a harder time rinsing their long hair so they have to use MORE water than we do. Women also like to take aromatic bathes where they just sit there in the water. I think we can rule that hypothesis out. | ||
| Klaas H New member Username: Jkkezh Post Number: 95 Registered: 08-2006 |
Or it could be the combination of (hot)water exposure and male hormones that accelerates the balding process. But I agree that it is unlikely. I know from my own experience that cutting down on washing hair made my scalp feel much better. I do not have itching painful scalp anymore. I only wash my hair with shampoo maybe once a week, and the rest of the days I wash with either cold or lukewarm water or no water at all. I think washing with (very) hot water and/or agressive shampoos can definately cause inflammation and might even accelerate the balding process. | ||
| wookster New member Username: Wookie Post Number: 151 Registered: 07-2006 |
You make a good point. Not all aquatic mammals are hairless/furless. Humans do go through seasonal sheddings and I am wondering if that type of shedding can be artificially induced by excessive exposure to hot water, etc. | ||
| Tom Hagerty Moderator Username: Admin Post Number: 3214 Registered: 01-2003 |
"I think washing with (very) hot water and/or agressive shampoos can definately cause inflammation and might even accelerate the balding process." That statement by Klaas H solves the water problem nicely I think. | ||
| wookster New member Username: Wookie Post Number: 152 Registered: 07-2006 |
Here are some interesting chemicals that are said to stimulate the 5 alpha reductase gene expression. http://www.freepatentsonline.com/5422371.html
http://members.aol.com/profchm/pham.html
http://www.ewg.org:16080/reports/skindeep2/report.php?type=INGREDIENT&id=10739
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| Klaas H New member Username: Jkkezh Post Number: 96 Registered: 08-2006 |
Thanks wookster very interesting, I am amazed how you always come up with new stuff like this, you must have read more then half the internet by now ;) |
