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Topical soy, 65% reduction in human sebum at week five


#1

This patent has a graph…

http://www.wipo.int/pctdb/en/wads.jsp?IA=US2003005494&LANGUAGE=EN&ID=090063618014838a&VOL=28&DOC=008576&WO=03/072079&WEEK=36/2003&TYPE=A1&DOC_TYPE=PAMPH&PAGE=1

For any of you suffering from an oily scalp…topical soy isoflavones (you can buy gel caps and drain some of it in your shampoo—while its in your hand and mix it up, but not so much of it as to make your hair oily) really might help you have less sebum up there if its a problem for you. It also might help you with some acne if you leave it on overnight if thats a problem also.

Both genestein and daidzien soy isoflavones were also very potent at inhibiting alpha five reductase type TWO (the kind finasteride inhibits) in whole cell assays and genestein has been shown to downreg expression of androgen receptors in human prostate cancer cell lines…

A little more on soy from another article demonstrating its anti-androgenic topical efficay in a mammal:

Cut and pasted from another article:

114E-5

Inhibition effect of genistein and soy isoflavone on sebum excretion in fuzzy rat
H.-W. PARK1, M.-S. Yang2, Y. C. Sim2, S. J. Lee2, and W. S. Park2. (1) Health products research team, Pharmaceutical & Health research institute, Amorepacific Corporation R&D Center, 314-1 Bora-ri, Kiheung-up, Yongin, 449-729, South Korea, (2) South Korea

Acne is a multifactorial disorder reflecting the role of infection, abnormal keratinization and immunologic reaction, as well as hormonal influences, on the pilosebaceous unit. For many clinical studies, acne had something to do with elevated levels of androgens, originating in both the andrenal glands and ovaries. The conversion of testosterone to dihydrotestosterone(DHT); 5a-reductase plays a crucial role in acne disorder. Isoflavone, flavonoids extracted from soy, is a estrogen-like compounds and genistein is one of the aglycone type of the soy flavonoids.

In order to search for effective plant extracts applied for androgenetic acne, we screened natural plant extracts having inhibitory activities of 5a-reductase type 2 and demonstrated its biological function in androgen-related animal models.

We evaluated the inhibition activities of isoflavone and genistein by contact cell based metabolic method using a stable HEK 293 cell line expressing human 5a-reductase(type 2). To elucidate the biological activity in vivo, the isoflavone and genistein were systemically applied to fuzzy rat(conc: 0mg, 50mg, 100mg, 200mg /body weight). The secreted sebum and the size of sebaceous glands of fuzzy rat were measured after 6 weeks.
Isoflavone showed higher inhibition activity of 5a-reductase type 2 ( IC50 value=2.4µ¶/µ¢) than that of isoflavone, but lower than that of finasteride. The amount of sebum and sebaceous gland size decreased remarkably in in-vivo test using fuzzy rat model

We have demonstrated the inhibitory activity of isoflavone and genistein for 5a-reductase type 2 and its biological action in fuzzy rat models, suggesting that genistein and isoflavone would be used as an effective agent for androgenetic acne and for the inhibition of secretion of sebum by modifying androgen conversion.

Session 114E, Nutraceuticals & Functional Foods: Bioactivity measurement and mechanism
8:30 AM - 12:00 PM, Friday AM Room Hall N-1

2004 IFT Annual Meeting, July 12-16 - Las Vegas, NV


#2

What’s the systemic story on this idea? Do we know anything either way?


#3

» What’s the systemic story on this idea? Do we know anything either way?

the patent is for a topical product, but now that youve mentioned it----I dont know of any test to see how much soy consumption internally has decreased sebum in a person or whatnot. If it absorbs through the skin, I suppose the effect would be no more than if one drank some soy milk (contains isoflavones) or something, etc.


#4

You may be overthinking my question. I was just wondering in the sense of Fin/Dut style side effect issues that come with system-wide DHT reductions.

Any topical anti-androgen that goes heavily systemic is basically just a waste of effort as far as I’m concerned. If it’s gonna go systemic then I’ll stick to the oral Fin. It’s a lot easier & more consistent.


#5

i have an oily saclp since last year
so are these gel caps proven to work or u just read sth about it


#6

» i have an oily saclp since last year
» so are these gel caps proven to work or u just read sth about it

"To elucidate the biological activity in vivo, the isoflavone and genistein were systemically applied to fuzzy rat(conc: 0mg, 50mg, 100mg, 200mg /body weight). The secreted sebum and the size of sebaceous glands of fuzzy rat were measured after 6 weeks.
Isoflavone showed higher inhibition activity of 5a-reductase type 2 ( IC50 value=2.4µ¶/µ¢) than that of isoflavone, but lower than that of finasteride. The amount of sebum and sebaceous gland size decreased remarkably in in-vivo test using fuzzy rat model
We have demonstrated the inhibitory activity of isoflavone and genistein for 5a-reductase type 2 and its biological action in fuzzy rat models, suggesting that genistein and isoflavone would be used as an effective agent for androgenetic acne and for the inhibition of secretion of sebum by modifying androgen conversion. "

That was the info given in the study.

Now here is the problem. Genistein inhibits epidermal growth factor. New information seems to indicate the for resting hairs to go into anagen, there has to be some epidermal growth factor signalling. Green tea’s EGCG pretty much does the same thing.

One thing that has been shown to decrease sebum greatly after a few weeks on human skin is cedarwood oil. Fluridil should decrease sebum somewhat. Dutasteride probably does to a lesser degree. Nizoral shrank sebacous glands when used 2-4 times per week by about 20% and lessened sebum secretions during that time also. Thats about all I know.