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Vitamins 'increase cholesterol'
"Diarmid Logan" wrote in message
m... http://news.bbc.co.uk/1/hi/health/3673365.stm Vitamins 'increase cholesterol' That's is indeed strange since vitamin c/ascorbate inhibits HMG-CoA reductase, which is targeted by the recent anti cholesterol drugs to lower cholesterol? (from vitamin c foundation) Inhibition of HMG-CoA reductase activity by ascorbic acid (http://www.jbc.org/cgi/content/abstract/261/16/7127) http://www.vitamincfoundation.org/statin.htm NATURE'S PERFECT STATIN® "I've not only read Alice in Wonderland, I've been there..." -- Owen Fonorow The hot selling statins, such as Lipitor® and Zocor®, lower cholesterol by blocking the coenzyme HMG-CoA reductase. When vitamin C levels are low, the body compensates and manufactures more cholesterol; when levels are high, the vitamin inhibits HMG-CoA reductase, lowering cholesterol. http://www.thincs.org/ The International Network of Cholesterol Skeptics For decades, enormous human and financial resources have been wasted on the cholesterol campaign, more promising research areas have been neglected, producers and manufacturers of animal food all over the world have suffered economically, and millions of healthy people have been frightened and badgered into eating a tedious and flavorless diet or into taking potentially dangerous drugs for the rest of their lives. As the scientific evidence in support of the cholesterol campaign is non-existent, we consider it important to stop it as soon as possible. Anth [snip] |
#2
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Vitamins 'increase cholesterol'
(http://www.bolenreport.com/)
This study and report is predicated on the assumption that natural lipoproteins are "harmful." Forgetting the problems of statistical association (toaster ovens are also a risk factor statistically correlated with heart disease) this report defies logic. Antioxidants raise a particular lipoprotein, thus the authors conclude, on that basis alone, that antioxidants may cause heart disease? This is news? A gross generalization based on a single finding? If there are harmful lipoproteins, why did they evolve? Why do vitamins such as vitamins E and Coenzyme Q10 require the "bad" LDL cholesterol in order to be transported throughout the body? How is it that vitamin D is made out of cholesterol from sunlight? The notion that antioxidants should be avoided may be good for the sales of pharmaceuticals, but such "news" leaves physicians, already poorly trained in nutrition, in the dark. - Editor Anth "Diarmid Logan" wrote in message m... http://news.bbc.co.uk/1/hi/health/3673365.stm Vitamins 'increase cholesterol' Vitamins could actually increase levels of "bad cholesterol", researchers have suggested. It had been thought that vitamins could protect the heart. But New York University researchers found vitamins including E, C and beta carotene stop the liver breaking down an early form of bad cholesterol. Writing in the Journal of Clinical Investigation, the researchers say their findings mean they cannot recommend that people use the vitamins. The vitamins are antioxidants, thought to be beneficial because they attack free radicals, produced when the body fights infection, which inflict damage on the body's tissues. But studies carried out by the researchers at the university's school of medicine found that antioxidants actually hampered the body's fight against damaging cholesterol. Normally, liver cells break down a key protein in harmful lipoproteins such as VLDL (very low density lipoprotein) which means they cannot be converted into a form of LDL that can enter the bloodstream. However, in laboratory tests, the New York researchers found vitamin E, C and beta carotene prevented this process taking place in liver cells. Further tests in mice and rat livers showed vitamin E prevented this "breakdown" process taking place, meaning the liver destroyed fewer lipoproteins. Dr Edward Fisher, director of the Lipid Treatment & Research Center at the NYU Medical Center, said: "Our study is the first to document this association between antioxidant vitamins and VLDL cholesterol. "It does appear that antioxidant vitamins may be potentially harmful for the heart based on their ability to increase the secretion of VLDL in the liver cells and in the mice that we studied." But he added: "More studies are needed to back up our findings. Until more data becomes available, we can't make any recommendations about whether people should not use these vitamins." However he said there was evidence from other animal studies that antioxidants could have beneficial effects on other parts of the body, such as protecting the arteries from atherosclerosis and the pancreas and other organs from damage caused by diabetes. Writing in the journal, Dr Ronald Krauss of Children's Hospital Oakland Research Institute in California, added that, although there was "considerable" evidence for the benefits of antioxidants, "the potential for unintended outcomes of oxidant therapy should serve as a warning against proceeding with such treatment in the absence of clinical-trial evidence of benefit and safety". Belinda Linden, head of Medical Information at the British Heart Foundation (BHF), told BBC News Online: "Most research tends to suggest that supplementation with antioxidant vitamins, although not beneficial, does not lead to undue harm. "Before any clear conclusions can be drawn from this study we would await the results of larger randomized controlled clinical trials." |
#3
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Vitamins 'increase cholesterol'
http://news.bbc.co.uk/1/hi/health/3673365.stm
Vitamins 'increase cholesterol' Vitamins could actually increase levels of "bad cholesterol", researchers have suggested. It had been thought that vitamins could protect the heart. But New York University researchers found vitamins including E, C and beta carotene stop the liver breaking down an early form of bad cholesterol. Writing in the Journal of Clinical Investigation, the researchers say their findings mean they cannot recommend that people use the vitamins. The vitamins are antioxidants, thought to be beneficial because they attack free radicals, produced when the body fights infection, which inflict damage on the body's tissues. But studies carried out by the researchers at the university's school of medicine found that antioxidants actually hampered the body's fight against damaging cholesterol. Normally, liver cells break down a key protein in harmful lipoproteins such as VLDL (very low density lipoprotein) which means they cannot be converted into a form of LDL that can enter the bloodstream. However, in laboratory tests, the New York researchers found vitamin E, C and beta carotene prevented this process taking place in liver cells. Further tests in mice and rat livers showed vitamin E prevented this "breakdown" process taking place, meaning the liver destroyed fewer lipoproteins. Dr Edward Fisher, director of the Lipid Treatment & Research Center at the NYU Medical Center, said: "Our study is the first to document this association between antioxidant vitamins and VLDL cholesterol. "It does appear that antioxidant vitamins may be potentially harmful for the heart based on their ability to increase the secretion of VLDL in the liver cells and in the mice that we studied." But he added: "More studies are needed to back up our findings. Until more data becomes available, we can't make any recommendations about whether people should not use these vitamins." However he said there was evidence from other animal studies that antioxidants could have beneficial effects on other parts of the body, such as protecting the arteries from atherosclerosis and the pancreas and other organs from damage caused by diabetes. Writing in the journal, Dr Ronald Krauss of Children's Hospital Oakland Research Institute in California, added that, although there was "considerable" evidence for the benefits of antioxidants, "the potential for unintended outcomes of oxidant therapy should serve as a warning against proceeding with such treatment in the absence of clinical-trial evidence of benefit and safety". Belinda Linden, head of Medical Information at the British Heart Foundation (BHF), told BBC News Online: "Most research tends to suggest that supplementation with antioxidant vitamins, although not beneficial, does not lead to undue harm. "Before any clear conclusions can be drawn from this study we would await the results of larger randomized controlled clinical trials." |
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Vitamins 'increase cholesterol'
Diarmid Logan wrote:
Vitamins 'increase cholesterol' Vitamins could actually increase levels of "bad cholesterol", researchers have suggested. It had been thought that vitamins could protect the heart. But New York University researchers found vitamins including E, C and beta carotene stop the liver breaking down an early form of bad cholesterol. Heh. So JC is probably going to outlive all of us. Marsha/Ohio |
#6
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Vitamins 'increase cholesterol'
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