Lukasz Komsta wrote:
>
> Dariusz wrote:
>
> > Skoro talk to mineral - krzemian magnezu, to czy spozywanie samego talku
> > nie moze kompensowac niedoborow magnezu ?
> > Czy krzemian magnezu jest metabolizowany czy tez w calosci usuwany z
> > organizmu ?
>
> ZTCW usuwany, bo nie jest rozpuszczalny w wodzie ani w słabym kwasie
> żołądka.
>
> > Czy byly prowadzone badania poziomu magnezu u pracownikow pracujacych
> > przy produkcji talku i wdychajacych do do pluc ?
>
> Nie, ale były prowadzone badania zmian płucnych. Badanie poziomu magnezu
> nie ma tu sensu. Ciekawe jest za to wstrzykiwanie dożylne talku u osób
> zażywających narkotyki poprzez rozpuszczanie tabletek, co wywołuje
> retinopatię.
>
> > Czy spozywanie samego talku jest zatem zdrowe/ szkodliwe/ obojetne/ nie
> > wchlania sie ???
>
> W ilościach zawartych w tabletkach obojętne/nie wchłania się.

Obawiam sie, ze posliznales sie na temacie.

Tutaj sa szczegoly.
M.in. badania karcogennosci talku.

http://dir.niehs.nih.gov/dirtob/rocpubcom/10throc/20
00nominations/talcasbestiform-nonasbestiform/shei-11
-28-00.pdf

Talk ma 2 postaci azbestowa i bezazbestowa

Wlokna talku znalezione w kredkach, ktore sa bardzo podobne do wlokien
azbestowych i z nimi mylone

http://www.crayola.com/safety/faq.cfm
"
What about the transitional talc fibers that the CPSC said were found in
Crayola crayons?

Transitional talc fibers are similar in
appearance to asbestos and are often
misidentified as asbestos. These fibers are not
asbestos, and are not
prohibited or regulated by any federal agency.
These transitional fibers are
naturally occurring in talc, which is used as a
binding agent in our crayons to
improve durability and strength.


Tutaj raport nt. toksycznosci talku
Q. Why is talc harmful?

A. Talc is closely related to the potent carcinogen asbestos.
Talc particles have been shown to
cause tumors in the ovaries and lungs of cancer victims. For
the last 30 years, scientists have
closely scrutinized talc particles and found dangerous
similarities to asbestos. Responding to this
evidence in 1973, the FDA drafted a resolution that would
limit the amount of asbestos-like fibers
in cosmetic grade talc. However, no ruling has ever been made
and today, cosmetic grade talc
remains non-regulated by the federal government. This
inaction ignores a 1993 National
Toxicology Program report which found that cosmetic grade
talc, without any asbestos-like fibers,
caused tumors in animal subjects.1 Clearly with or without
asbestos-like fibers, cosmetic grade
talcum powder is a carcinogen.

Q. What kind of exposure is dangerous?

A. Talc is toxic. Talc particles cause tumors in human
ovaries and lungs. Numerous studies have
shown a strong link between frequent use of talc in the
female genital area and ovarian cancer.
Talc particles are able to move through the reproductive
system and become imbedded in the lining
of the ovary. Researchers have found talc particles in
ovarian tumors and have found that women
with ovarian cancer have used talcum powder in their genital
area more frequently than healthy
women.2

Talc poses a health risk when exposed to the lungs. Talc
miners have shown higher rates of lung
cancer and other respiratory illnesses from exposure to
industrial grade talc, which contains
dangerous silica and asbestos. The common household hazard
posed by talc is inhalation of baby
powder by infants. Since the early 1980s, records show that
several thousand infants each year
have died or become seriously ill following accidental
inhalation of baby powder.3

Q. What about infants?

A. Talc is used on babies because it absorbs unpleasant
moisture. Clearly, dusting with talcum
powder endangers an infant's lungs at the prospect of
inhalation. Exposing children to this
carcinogen is unnecessary and dangerous.

HERE ARE THREE THINGS THAT YOU CAN DO:

1. Do not buy or use products containing talc. It is
especially important that women not apply
talc to underwear or sanitary pads.

2. Contact your pediatrician and/or local hospital and find
out if they have a policy regarding
talc use and infants.

3. Write to the FDA and express your concern that a proven
carcinogen has remained
unregulated while millions of people is unknowingly exposed.

FOR MORE INFORMATION:

Cancer Prevention Coalition c/o School of Public Health
University of Illinois Medical Center
2121 West Taylor Street
Chicago, IL 60612