It has been well documented that consumption of too much red meat as an adult can lead increased risk for type 2 diabetes, coronary heart disease, stroke and certain cancers.
Now researchers in the US and Italy have gathered enough data, over a period of two decades, to conclude that individuals who have diets high in animal proteins during their middle age are four times more likely to die of cancer then their counterparts who had diets low in animal proteins. A risk some have compared with smoking. An increased risk of developing Diabetes Type 2 was also observed.
Valter Longo, a University of Southern California gerontology professor and director of the school’s Longevity Institute, who co-authored the study pointed out "The great majority of Americans could reduce their protein intake," and added "The best change would be to lower the daily intake of all proteins, but especially animal-derived proteins."
The interesting finding though was the fact that if you started eating more animal proteins after the age of 66 years, it is actually good for your health.
Here are two articles on the subject:
Too much animal-based proteins could lead to early death, study says ( Brady Dennis for The Washington Post)
Showing posts with label Cancer. Show all posts
Showing posts with label Cancer. Show all posts
Friday, March 7, 2014
Monday, February 24, 2014
Vitamin E and Selenium supplements may increase risk of cancer
With this increasing obsession with fitness and health the use of supplements such as vitamins, minerals, and herbal has increased exponentially. The increased efforts to stay healthy are good news but the fact that a huge majority of individuals do not even know what supplement to take or not to take, many end up losing any benefit and incur more damage to their health then advantage.
Recent clinical trials have shown that the unnecessary use of certain dietary supplements can lead to far more serious problems then known before. Such a study conducted in the US has shown that the high levels of the mineral Selenium can lead to a 91% increased risk for high grade cancer.
According to the the study leader Dr. Alan Kristal (Fred Hutchinson Cancer Research Centre, Seattle)"These supplements are popular – especially vitamin E – although so far no large, well-designed and well-conducted study has shown any benefits for preventing major chronic disease.
"Men using these supplements should stop, period. Neither selenium nor vitamin E supplementation confers any known benefits, only risks."
This adverse effect appeared only when men with already high levels took the selenium supplement and not in men who originally had low levels. It was also noted that Vitamin E also increased the risk of cancer almost doubling it in men who had low level of selenium.
This study was a follow-up of Select (selenium and vitamin E cancer prevention trial), which originally recruited more than 35,000 men to see if the supplements could help prevent prostate cancer. The main goal of the trial was to prove whether selenium and vitamin E supplements actually prevented prostrate cancer. It was concluded "SELECT was initially planned for a minimum of seven years and a maximum of 12 years of participants taking supplements, plus follow-up observation after the men finished taking their supplements. However, the independent Data and Safety Monitoring Committee (DSMC) for the trial met on September 15, 2008, to review SELECT study data and found that selenium and vitamin E, taken alone or together did not prevent prostate cancer. The committee also determined that it was unlikely selenium and vitamin E supplementation would ever produce a 25 percent reduction in prostate cancer incidence, as the study was designed to show. Based on their recommendation, with SWOG and NCI agreement, SELECT participants were told in October 2008 to stop taking their study supplements." (National Cancer Institute)
The Select trial suggested that Vitamin E intake may have more detrimental effects then initially thought, whereas the outcome of overuse of selenium was still disputed hence the follow up study. "In 2011, data showed that men taking vitamin E alone had a significantly increased risk of prostate cancer, but men taking vitamin E plus selenium did not. If men had low selenium levels at the start of the trial, the selenium supplement may have counteracted a negative effect of the vitamin E supplement." (Select study - NCI)
The results of this follow-up study have shown a clear relation between selenium and vitamin E supplements and the increased risk of prostrate cancer.
"In an analysis published in 2014, men who had high levels of selenium at the start of the trial, as assessed by measures of selenium in their toenail clippings, had almost double the chance of developing a high-grade prostate cancer if they took the selenium supplement compared to men with low levels of selenium at the start of the trial. This finding was unexpected, as previous studies had shown that men with low levels of selenium had an increased risk of prostate cancer that was reduced with supplements (11, 12). Additionally, men with low levels of selenium at the start of the trial had double the chance of developing a high-grade prostate cancer if they took the vitamin E supplement."
(National Cancer Institute)
A detailed article on the latest results was published on February 21st 2014 in The Guardian, titled
Some vitamin supplements raise risk of cancer in men, research shows. (The Guardian)
Recent clinical trials have shown that the unnecessary use of certain dietary supplements can lead to far more serious problems then known before. Such a study conducted in the US has shown that the high levels of the mineral Selenium can lead to a 91% increased risk for high grade cancer.
According to the the study leader Dr. Alan Kristal (Fred Hutchinson Cancer Research Centre, Seattle)"These supplements are popular – especially vitamin E – although so far no large, well-designed and well-conducted study has shown any benefits for preventing major chronic disease.
"Men using these supplements should stop, period. Neither selenium nor vitamin E supplementation confers any known benefits, only risks."
This adverse effect appeared only when men with already high levels took the selenium supplement and not in men who originally had low levels. It was also noted that Vitamin E also increased the risk of cancer almost doubling it in men who had low level of selenium.
This study was a follow-up of Select (selenium and vitamin E cancer prevention trial), which originally recruited more than 35,000 men to see if the supplements could help prevent prostate cancer. The main goal of the trial was to prove whether selenium and vitamin E supplements actually prevented prostrate cancer. It was concluded "SELECT was initially planned for a minimum of seven years and a maximum of 12 years of participants taking supplements, plus follow-up observation after the men finished taking their supplements. However, the independent Data and Safety Monitoring Committee (DSMC) for the trial met on September 15, 2008, to review SELECT study data and found that selenium and vitamin E, taken alone or together did not prevent prostate cancer. The committee also determined that it was unlikely selenium and vitamin E supplementation would ever produce a 25 percent reduction in prostate cancer incidence, as the study was designed to show. Based on their recommendation, with SWOG and NCI agreement, SELECT participants were told in October 2008 to stop taking their study supplements." (National Cancer Institute)
The Select trial suggested that Vitamin E intake may have more detrimental effects then initially thought, whereas the outcome of overuse of selenium was still disputed hence the follow up study. "In 2011, data showed that men taking vitamin E alone had a significantly increased risk of prostate cancer, but men taking vitamin E plus selenium did not. If men had low selenium levels at the start of the trial, the selenium supplement may have counteracted a negative effect of the vitamin E supplement." (Select study - NCI)
The results of this follow-up study have shown a clear relation between selenium and vitamin E supplements and the increased risk of prostrate cancer.
"In an analysis published in 2014, men who had high levels of selenium at the start of the trial, as assessed by measures of selenium in their toenail clippings, had almost double the chance of developing a high-grade prostate cancer if they took the selenium supplement compared to men with low levels of selenium at the start of the trial. This finding was unexpected, as previous studies had shown that men with low levels of selenium had an increased risk of prostate cancer that was reduced with supplements (11, 12). Additionally, men with low levels of selenium at the start of the trial had double the chance of developing a high-grade prostate cancer if they took the vitamin E supplement."
(National Cancer Institute)
A detailed article on the latest results was published on February 21st 2014 in The Guardian, titled
Some vitamin supplements raise risk of cancer in men, research shows.
P.S:
References:
Selenium and Vitamin E Cancer Prevention Trial (SELECT) (National Cancer Institute) Some vitamin supplements raise risk of cancer in men, research shows. (The Guardian)
Monday, February 17, 2014
Cancer on the rise in the world
Since the release of the World Cancer Report 2014 by the WHO, we have been seeing headlines like 'Cancer 'tidal wave' on horizon, warns WHO' (BBC World) and for good reason.
The stats in the report have gotten everyone's attention. It suggests that the number of cancer cases might reach 24 million by 2035. It also points out that world health issues such as smoking, drinking, and obesity must be effectively dealt with to reduce that number.
The stats in the report have gotten everyone's attention. It suggests that the number of cancer cases might reach 24 million by 2035. It also points out that world health issues such as smoking, drinking, and obesity must be effectively dealt with to reduce that number.
The International Agency for Research on Cancer (WHO) press release states:
Global battle against cancer won’t be won with treatment alone.
This World Cancer Report 2014 highlights the presence of a cancer divide.
Many of the cancers seen in developing countries are high infection related cancers (cancer of liver, cervix and stomach) or are cancer known to be associated with the industrialized lifestyles (cancer of lungs, breast and large bowel). Therefore high mortality from cancer in these countries could be significantly reduced if they have access to effective and affordable cancer treatments but also by implementation of vaccination programs (Hep B and HPV) and preventive efforts towards the spread of tobacco.
The rising number of cancer cases is proving to be detrimental to the economy of even the richest countries. According to the report 'In 2010, the total annual economic cost of cancer was estimated to reach approximately US$ 1.16 trillion. Yet about half of all cancers could be avoided if current knowledge was adequately implemented.'
Last but not least the report stresses on the need for widespread efforts towards early detection and treatment and the promotion of adequate legislation to reduce exposure and risk behaviours.
P.S:
Global battle against cancer won’t be won with treatment alone.
Effective prevention measures urgently needed to prevent cancer crisis.
Based on the latest statistics on trends in cancer incidence and mortality worldwide, this new book reveals how the cancer burden is growing at an alarming pace and emphasizes the need for urgent implementation of efficient prevention strategies to curb the disease.
Despite exciting advances, this Report shows that we cannot treat our way out of the cancer problem,” states Dr Christopher Wild, Director of IARC and co-editor of the book. “More commitment to prevention and early detection is desperately needed in order to complement improved treatments and address the alarming rise in cancer burden globally.”
Despite exciting advances, this Report shows that we cannot treat our way out of the cancer problem,” states Dr Christopher Wild, Director of IARC and co-editor of the book. “More commitment to prevention and early detection is desperately needed in order to complement improved treatments and address the alarming rise in cancer burden globally.”
In 2012, the worldwide burden of cancer rose to an estimated 14 million newcases per year, a figure
expected to rise to 22 million annually within the next two decades. Over the same period, cancer deaths are predicted to rise from an estimated 8.2 million annually to 13 million per year.
According to the report globally the highest number of diagnosed cancers were lung cancer, breast cancer and cancer of the large bowel. The highest number of cancer deaths were caused by cancer of the lungs, followed by cancers of the liver and stomach.
This World Cancer Report 2014 highlights the presence of a cancer divide.
As a consequence of growing and ageing populations, developing countries are disproportionately affected by the increasing numbers of cancers. More than 60% of the world’s total cases occur in Africa, Asia, and Central and South America, and these regions account for about 70% of the world’s cancer deaths, a situation that is made worse by the lack of early detection and access to treatment.
Many of the cancers seen in developing countries are high infection related cancers (cancer of liver, cervix and stomach) or are cancer known to be associated with the industrialized lifestyles (cancer of lungs, breast and large bowel). Therefore high mortality from cancer in these countries could be significantly reduced if they have access to effective and affordable cancer treatments but also by implementation of vaccination programs (Hep B and HPV) and preventive efforts towards the spread of tobacco.
The rising number of cancer cases is proving to be detrimental to the economy of even the richest countries. According to the report 'In 2010, the total annual economic cost of cancer was estimated to reach approximately US$ 1.16 trillion. Yet about half of all cancers could be avoided if current knowledge was adequately implemented.'
Last but not least the report stresses on the need for widespread efforts towards early detection and treatment and the promotion of adequate legislation to reduce exposure and risk behaviours.
P.S:
Cancer 'tidal wave' on horizon, warns WHO (BBC World February 4th 2014)
International Agency for Research Cancer
World Cancer Research Fund International
International Agency for Research Cancer
World Cancer Research Fund International
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