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CX2SA > MEDIC 15.09.05 04:45l 72 Lines 3078 Bytes #999 (0) @ WW
BID : 34705_CX2SA
Read: GUEST DK4IR DO3MI
Subj: Vitamin C help to fight cancer
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Sent: 050915/0225Z @:CX2SA.LAV.URY.SA #:34705 [Minas] FBB7.00e $:34705_CX2SA
From: CX2SA@CX2SA.LAV.URY.SA
To : MEDIC@WW
Vitamin C 'helps to fight cancer'
=================================
High doses of vitamin C injected into the bloodstream may help fight cancer, a
US study says.
Scientists found that intravenous vitamin C in the form of ascorbate killed
cancer cells in lab tests.
The findings contradict earlier studies, but the Maryland-based Institutes of
Health said they had looked at lower-dose oral vitamin C.
Cancer experts said the "overwhelming" evidence still suggested vitamin C was
not an effective treatment.
Studies in the 1970s first suggested the administration of high doses of
vitamin C could help treat cancer, but later research did not back this up.
In the latest study, published in the Proceedings of the National Academy of
Sciences, researchers conducted laboratory experiments which simulated clinical
infusions of vitamin C on a range of nine cancer and four normal cells.
In five of the cancer lines, there was a 50% decrease in cell survival, while
normal cells were unaffected.
A more detailed look at lymphoma cells - which were especially sensitive to
ascorbate - showed they were killed completely.
The effective dose was around four millimoles, a concentration much higher than
an oral dose but easily achievable by intravenous infusion.
Cells
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Researchers were unable to explain what caused the results, although they did
note the treatment led to the formation of hydrogen peroxide, a chemical known
to be toxic to cells.
Alternative medicine practitioners have already administered high doses of
intravenous ascorbate.
Lead researcher Dr Mark Levine said the treatment would have to be proved safe
before being given to patients.
But he added: "Ascorbate as a potential cancer therapeutic agent has a
controversial and emotionally charged past."
Henry Scowcroft, senior information officer at Cancer Research UK, said despite
the findings, the "overwhelming" evidence still pointed to vitamin C not being
an effective treatment.
"This work is at a very early stage. There are many substances that have been
shown to kill cancer cells in the lab, but failed to fulfil that promise when
tested in people.
"But we do know that eating a healthy, balanced diet, including plenty of fresh
fruit and vegetables, is an effective way to reduce the risk of getting cancer
in the first place."
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