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Malatharneo
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PostPosted: Mon 05 Nov 2007 17:42    Post subject: Does coffee gives cancer? Reply with quote

This question is keep popping in my head Confused and I was wondering does Coffee gives cancer or not??

[b]Also does Tea gives cancer and sugar also give cancer?
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Ragnarok
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PostPosted: Mon 05 Nov 2007 18:09    Post subject: Reply with quote

Coffee:

From the European Journal of Cancer Preveition (via the NIH):
Quote:
Epidemiological studies on the relation between coffee consumption and cancer risk have been mainly focused on cancers of the urinary bladder, pancreas and colorectum. The relation between coffee and bladder cancer is controversial, despite a large number of studies published over the last three decades. In most studies, the risk[of bladder cancer] tends to be higher in coffee drinkers than in those who do not drink coffee, but the excess risk is generally moderate and is neither dose- nor duration-related. Thus, a strong association between coffee drinking and bladder cancer can be excluded, although it is still unclear whether the weak association is causal or nonspecific and due to some bias or confounding. For pancreatic cancer, a possible association with coffee consumption has been postulated in a large case-control study published in 1981; since then, however, most studies have shown no substantial association, and overall evidence suggests that coffee is not materially related to pancreatic cancer risk. Overall evidence on the coffee-colorectal cancer relation suggests an inverse association, since most case-control studies found odds ratios below unity, particularly for colon cancer. The pattern of risk is less clear for cohort studies. A plausible biological explanation has been given in terms of coffee-related reduction of bile acids and neutral sterol secretion in the colon. For other cancer sites, including oral cavity, oesophagus, stomach, liver, breast, ovary, kidney and lymphoid neoplasms, the relation of coffee drinking with cancer risk has been less extensively investigated, but the evidence is largely reassuring. (emphasis added)


Or, in short, relatively inconclusive.


Tea and coffee (pancreatic cancer):

From the New England Journal of Medicine:

Quote:
We questioned 369 patients with histologically proved cancer of the pancreas and 644 control patients about their use of tobacco, alcohol, tea, and coffee. There was a weak positive association between pancreatic cancer and cigarette smoking, but we found no association with use of cigars, pipe tobacco, alcoholic beverages, or tea. A strong association between coffee consumption and pancreatic cancer was evident in both sexes.


This one says yes to coffee, no to tea. Also, though, I'd caution against taking the word of just one study as a final proof.

And, a Times article may suggest why:
Quote:
COFFEE is responsible for as much as a third of daily consumption of the cancer-causing chemical acrylamide, research by the United Nations has found.

The study reveals that coffee may give those who drink it anything from 13% to 39% of the acrylamide they consume — only chips and crisps are responsible for greater quantities on average.

Acrylamide is produced during cooking, particularly high-temperature processes such as frying and roasting. Some of the highest levels are found in chips, crisps, biscuits and bread, but it has now emerged that roasting coffee beans also produces significant amounts.
...
Since 2002 several studies have been undertaken into acrylamide in food and its possible dangers, although not all experts agree it is hazardous to people in the amounts usually consumed.

A report commissioned by the National Toxicology Program in America concluded: “Considering the low level of estimated human exposure to acrylamides (we have) negligible concern for adverse reproductive and developmental effects.”
...
Many scientists in Britain say that until the risk posed by acrylamide can be assessed with greater confidence it might make sense to consume as little as possible.

“There is no doubt it (acrylamide) has been identified as carcinogenic in animal models, so the best advice is precautionary, to minimise exposure,” said Professor Vyvyan Howard of the school of biological sciences at Ulster University.


This one is a suggestive yes to coffee, but still is not giving a definite yes.

Tea:
From the National Cancer Institute:
Quote:
* The antioxidants found in tea--called catechins--may selectively inhibit the growth of cancer.

* In laboratory studies using animals, catechins scavenged oxidants before cell damage occurred, reduced the number and size of tumors, and inhibited the growth of cancer cells.

* However, human studies have proven more contradictory, perhaps due to such factors as variances in diet, environments, and populations.

* NCI researchers are investigating the therapeutic and preventive use of tea catechins against a variety of cancers.
...
Investigators are especially interested in the antioxidants-called catechins-found in tea. Despite promising early research in the laboratory, however, studies involving humans so far have been inconclusive.


So no, and it may even have anti-cancer properties, though those results are still inconclusive.

Sugar:
Checked the FDA and NCI pages, and this was the most that I could find.

Quote:
Questions about artificial sweeteners and cancer arose when early studies showed that cyclamate in combination with saccharin caused bladder cancer in laboratory animals. However, results from subsequent carcinogenicity studies (studies that examine whether a substance can cause cancer) on these sweeteners and other approved sweeteners have not provided clear evidence of an association between artificial sweeteners and cancer in people.


So sugar is a (probably, anyway) no, and artificial sweeteners are unproven.

Extra note: there are many sites that are claiming that there is a link, but I'm not taking the word of .com sites, preferring to stick with the more professional organizations, which usually have .org, .edu or .gov suffixes. Even then, I'm trusting the .gov (and .edu, if I had found any) sites more than any others.
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Vermillion
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PostPosted: Tue 04 Dec 2007 18:50    Post subject: Reply with quote

So Ive probabl got Cancer lying dormant somewhere in me then???
Ive been drinking coffe since I could remember, and NOW I find out that the caffeine is not the only thing that could kill you???
GEEZ!
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Ragnarok
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PostPosted: Tue 04 Dec 2007 22:09    Post subject: Reply with quote

Since the difference between a normal cell and a cancer cell is (assuming I remember high school biology correctly) that the cancer cell just has a limiter released, then yes, you, like everyone else has cancer lying dormant.

More seriously, though, no. At most, it increases the risk of developing cancer, not making "little cancers" appear and lie dormant.

Edit: typo.
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Last edited by Ragnarok on Wed 05 Dec 2007 9:05; edited 1 time in total
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Vermillion
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PostPosted: Wed 05 Dec 2007 5:27    Post subject: Reply with quote

well that gives me a little consolation...
God, now I have to watch the way I consume coffe. I drink it almost 3 times a day....
I gotta start cutting down Confused
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Icedheart
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PostPosted: Wed 05 Dec 2007 12:15    Post subject: Reply with quote

It kind of depends what you consume coffee with. I find i drink it when i'm having a low, but the fact that it doesn't give me energy does not help.
In fact because of this i have had to start having coffee with sugar but normally i iwll stick to unvaried juice and milk.
Cancer as some scientists have spoken can lie dormant and by consuming or doing certain things will of cause cause an out break, it is a virus and as viruses (such as bacteria) they can spread but unlike bacteria they will stay within the body but once again lay dormant.
I have asked a couple of science teachers and they say it's inconclusive as some say yes...
So my answer, is of course inconclusive. Smile
So i shouldn't think this helped much but just sharing what i know in the shortest way i can. Wink
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PostPosted: Wed 05 Dec 2007 12:45    Post subject: Reply with quote

icedheart wrote:
It kind of depends what you consume coffee with. I find i drink it when i'm having a low, but the fact that it doesn't give me energy does not help.
In fact because of this i have had to start having coffee with sugar but normally i iwll stick to unvaried juice and milk.


That has nothing to do with the purported claims about coffee's carcinogenic properties. Those properties come from the coffee, not from what you put in it.

Quote:
Cancer as some scientists have spoken can lie dormant and by consuming or doing certain things will of cause cause an out break, it is a virus and as viruses (such as bacteria) they can spread but unlike bacteria they will stay within the body but once again lay dormant.


While cancer can be treated and go into remission, what was being talked about in the articles or in Vermillion's posts had nothing to do with either. Further, cancer is not a virus. Some virii (HPV, for example) are linked to the development of certain types of cancers, but cancer itself is not a virus (not counting DFTD, which is a very unique case).
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Kasatar
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PostPosted: Thu 06 Dec 2007 4:56    Post subject: Reply with quote

Well, I dont know if coffee can give cancer, but one thing I do know. Every so often medical proffesionals always come out saying new things. One year something is bad, the next they come out saying it is good in small quantitys.

Why are you even worrying about it. Just take life as it comes and enjoy it. Life is to short to be worrying. Who wants live forever anyway.
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