Thread View: sci.life-extension
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Started by Ian Goddard
Sat, 02 Aug 2003 05:00
Iron Toxicity
Author: Ian Goddard
Date: Sat, 02 Aug 2003 05:00
Date: Sat, 02 Aug 2003 05:00
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After mentioning potential risks associated with iron intake above necessary levels to some friends, some of whom seemed skeptical, I gathered some of the data, which, having collected, I thought I'd share with folks here... This review from "Nutrition Today" (5/6/97) by two leading researchers examines risks associated with iron and concludes that apart from deficiencies, "There is little reason to support a general need for iron supplementation in the diet at any age. [...] don't expose your system to more iron than it needs." While essential at recommended levels, iron generates toxic oxygen radicals. It also notes that iron intake is cumulative, since "iron accumulates in the brain with normal aging." http://web.archive.org/web/20010901081956/http://pspinformation.com/nutrition/minerals/iron.shtml Iron's possible supporting role in neurological degeneration: Proceedings of the National Academy of Sciences (May 28, 2002): "Whereas a decade ago thoughts of metals and Alzheimer's disease (AD) conjured up thoughts of tossing out your aluminum cookware, more recently, zinc, copper, and iron have been implicated in AD pathology." http://www.pnas.org/cgi/content/full/99/11/7317 Cellular and Molecular Biology (June 2000): "In several neurodegenerative diseases, iron accumulates at sites of brain pathology. Since post-mortem examination cannot distinguish whether iron accumulation caused the damage or resulted from damage, it is necessary to manipulate iron in animal and tissue culture models to assess its causal role(s). [...] iron supplementation to ID rats increased damage and microgliosis in the above regions. [...] In addition, iron+zinc supplementation dramatically increased damage to hippocampal CA1 whereas zinc supplementation alone had no effect." http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10875437&dopt=Abstract Journal of Neurochemistry (July 1992): "Iron, a transition metal possibly involved in the pathogenesis of Parkinson's disease, was tested for its toxic effects toward cultures of dissociated rat mesencephalic cells. [...] Altogether, these results suggest (a) that ferrous iron is a potent neurotoxin for dopaminergic neurons as well as for other cell types in dissociated mesencephalic cultures [...]." http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=1613493&dopt=Abstract Professor James Connor (author of "Nutrition Today" review quoted at top of post): "Our data had led to the discovery that the brain's ability to mobilize iron is diminished in Alzheimer's Disease and in specific regions of the brain in Parkinson's Disease. This diminished iron mobilization could lead to increased susceptibility to oxidative damage and cell death; both of which are prominent features in Alzheimer's and Parkinson's diseases." http://www.hmc.psu.edu/depts/old%20pages-kms%20save/neuro/faculty/jrconnor.htm Current Opinion in Chemical Biology (April 4, 2000): "Data are now rapidly accumulating to show that metallochemical reactions might be the common denominator underlying Alzheimer's disease, amyotrophic lateral sclerosis, prion diseases, cataracts, mitochondrial disorders and Parkinson's disease. In these disorders, an abnormal reaction between a protein and a redox-active metal ion (copper or iron) promotes the formation of reactive oxygen species or radicalization." http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=retrieve&db=pubmed&list_uids=10742195&dopt=Abstract Alzheimer�s disease (AD) appears to be associated with a dysregulation of heavy metals, possibly as a result of impairment of metallothione (the body's natural defense against metal toxicity) that may be associated with the ApoE genetic defect that increases the risk of AD. Aluminum and Alzheimer's disease: http://www.google.com/groups?selm=gq8havshkhetd6s78ctbgvc8iev0gtma1n%404ax.com Mercury and Alzheimer's disease: http://www.google.com/groups?selm=3af37029.2307577%40news.erols.com http://IanGoddard.net/journal.htm "To lengthen thy life, lessen thy meals." Ben Franklin Ongoing CR-monkey-study update: "In the monkeys...those on reduced feeding since the study started are dying at a rate that is about half that of the monkeys receiving a full food ration." Associated Press: Eating less may extend human life. August 1, 2002 : http://www.msnbc.com/news/788746.asp?0si=-
Re: Iron Toxicity
Author: Anth
Date: Sun, 03 Aug 2003 12:30
Date: Sun, 03 Aug 2003 12:30
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Good way to get rid of iron is to give blood. Anth "Ian Goddard" <igoddard@erols.mom> wrote in message news:bhfmiv867s916mglu8ioerf60ninn8b2hs@4ax.com... > > After mentioning potential risks associated with iron intake > above necessary levels to some friends, some of whom seemed > skeptical, I gathered some of the data, which, having > collected, I thought I'd share with folks here... > > This review from "Nutrition Today" (5/6/97) by two leading > researchers examines risks associated with iron and concludes > that apart from deficiencies, "There is little reason to support > a general need for iron supplementation in the diet at any age. > [...] don't expose your system to more iron than it needs." > While essential at recommended levels, iron generates toxic > oxygen radicals. It also notes that iron intake is cumulative, > since "iron accumulates in the brain with normal aging." > http://web.archive.org/web/20010901081956/http://pspinformation.com/nutrition/minerals/iron.shtml > > Iron's possible supporting role in neurological degeneration: > > Proceedings of the National Academy of Sciences (May 28, 2002): > "Whereas a decade ago thoughts of metals and Alzheimer's disease > (AD) conjured up thoughts of tossing out your aluminum cookware, > more recently, zinc, copper, and iron have been implicated in > AD pathology." > http://www.pnas.org/cgi/content/full/99/11/7317 > > Cellular and Molecular Biology (June 2000): "In several > neurodegenerative diseases, iron accumulates at sites of > brain pathology. Since post-mortem examination cannot > distinguish whether iron accumulation caused the damage or > resulted from damage, it is necessary to manipulate iron in > animal and tissue culture models to assess its causal role(s). > [...] iron supplementation to ID rats increased damage and > microgliosis in the above regions. [...] In addition, > iron+zinc supplementation dramatically increased damage to > hippocampal CA1 whereas zinc supplementation alone had no effect." > http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10875437&dopt=Abstract > > Journal of Neurochemistry (July 1992): "Iron, a transition > metal possibly involved in the pathogenesis of Parkinson's > disease, was tested for its toxic effects toward cultures of > dissociated rat mesencephalic cells. [...] Altogether, these > results suggest (a) that ferrous iron is a potent neurotoxin > for dopaminergic neurons as well as for other cell types in > dissociated mesencephalic cultures [...]." > http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=1613493&dopt=Abstract > > Professor James Connor (author of "Nutrition Today" review > quoted at top of post): "Our data had led to the discovery > that the brain's ability to mobilize iron is diminished in > Alzheimer's Disease and in specific regions of the brain > in Parkinson's Disease. This diminished iron mobilization > could lead to increased susceptibility to oxidative damage > and cell death; both of which are prominent features in > Alzheimer's and Parkinson's diseases." > http://www.hmc.psu.edu/depts/old%20pages-kms%20save/neuro/faculty/jrconnor.htm > > Current Opinion in Chemical Biology (April 4, 2000): "Data > are now rapidly accumulating to show that metallochemical > reactions might be the common denominator underlying > Alzheimer's disease, amyotrophic lateral sclerosis, prion > diseases, cataracts, mitochondrial disorders and Parkinson's > disease. In these disorders, an abnormal reaction between a > protein and a redox-active metal ion (copper or iron) > promotes the formation of reactive oxygen species or radicalization." > http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=retrieve&db=pubmed&list_uids=10742195&dopt=Abstract > > Alzheimer's disease (AD) appears to be associated with > a dysregulation of heavy metals, possibly as a result of > impairment of metallothione (the body's natural defense > against metal toxicity) that may be associated with the > ApoE genetic defect that increases the risk of AD. > > Aluminum and Alzheimer's disease: > http://www.google.com/groups?selm=gq8havshkhetd6s78ctbgvc8iev0gtma1n%404ax.com > > Mercury and Alzheimer's disease: > http://www.google.com/groups?selm=3af37029.2307577%40news.erols.com > > > http://IanGoddard.net/journal.htm > > "To lengthen thy life, lessen thy meals." Ben Franklin > > Ongoing CR-monkey-study update: "In the monkeys...those on > reduced feeding since the study started are dying at a rate > that is about half that of the monkeys receiving a full food > ration." Associated Press: Eating less may extend human life. > August 1, 2002 : http://www.msnbc.com/news/788746.asp?0si=- > >
Re: Iron Toxicity
Author: Virginia
Date: Sun, 03 Aug 2003 18:02
Date: Sun, 03 Aug 2003 18:02
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I've also seen information that iron overload can cause heart problems - hence the greater percentage of men having problems than women - as women lose a lot of iron with their menses. Iron-supplemented baby formula is SCARY. Virginia "Forgiveness is easier to obtain than permission." www.thedesignuniverse.com "Ian Goddard" <igoddard@erols.mom> wrote in message news:bhfmiv867s916mglu8ioerf60ninn8b2hs@4ax.com... > > After mentioning potential risks associated with iron intake > above necessary levels to some friends, some of whom seemed > skeptical, I gathered some of the data, which, having > collected, I thought I'd share with folks here... > > This review from "Nutrition Today" (5/6/97) by two leading > researchers examines risks associated with iron and concludes > that apart from deficiencies, "There is little reason to support > a general need for iron supplementation in the diet at any age. > [...] don't expose your system to more iron than it needs." > While essential at recommended levels, iron generates toxic > oxygen radicals. It also notes that iron intake is cumulative, > since "iron accumulates in the brain with normal aging." > http://web.archive.org/web/20010901081956/http://pspinformation.com/nutritio n/minerals/iron.shtml > > Iron's possible supporting role in neurological degeneration: > > Proceedings of the National Academy of Sciences (May 28, 2002): > "Whereas a decade ago thoughts of metals and Alzheimer's disease > (AD) conjured up thoughts of tossing out your aluminum cookware, > more recently, zinc, copper, and iron have been implicated in > AD pathology." > http://www.pnas.org/cgi/content/full/99/11/7317 > > Cellular and Molecular Biology (June 2000): "In several > neurodegenerative diseases, iron accumulates at sites of > brain pathology. Since post-mortem examination cannot > distinguish whether iron accumulation caused the damage or > resulted from damage, it is necessary to manipulate iron in > animal and tissue culture models to assess its causal role(s). > [...] iron supplementation to ID rats increased damage and > microgliosis in the above regions. [...] In addition, > iron+zinc supplementation dramatically increased damage to > hippocampal CA1 whereas zinc supplementation alone had no effect." > http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_ui ds=10875437&dopt=Abstract > > Journal of Neurochemistry (July 1992): "Iron, a transition > metal possibly involved in the pathogenesis of Parkinson's > disease, was tested for its toxic effects toward cultures of > dissociated rat mesencephalic cells. [...] Altogether, these > results suggest (a) that ferrous iron is a potent neurotoxin > for dopaminergic neurons as well as for other cell types in > dissociated mesencephalic cultures [...]." > http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_ui ds=1613493&dopt=Abstract > > Professor James Connor (author of "Nutrition Today" review > quoted at top of post): "Our data had led to the discovery > that the brain's ability to mobilize iron is diminished in > Alzheimer's Disease and in specific regions of the brain > in Parkinson's Disease. This diminished iron mobilization > could lead to increased susceptibility to oxidative damage > and cell death; both of which are prominent features in > Alzheimer's and Parkinson's diseases." > http://www.hmc.psu.edu/depts/old%20pages-kms%20save/neuro/faculty/jrconnor.h tm > > Current Opinion in Chemical Biology (April 4, 2000): "Data > are now rapidly accumulating to show that metallochemical > reactions might be the common denominator underlying > Alzheimer's disease, amyotrophic lateral sclerosis, prion > diseases, cataracts, mitochondrial disorders and Parkinson's > disease. In these disorders, an abnormal reaction between a > protein and a redox-active metal ion (copper or iron) > promotes the formation of reactive oxygen species or radicalization." > http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=retrieve&db=pubmed&list_ui ds=10742195&dopt=Abstract > > Alzheimer's disease (AD) appears to be associated with > a dysregulation of heavy metals, possibly as a result of > impairment of metallothione (the body's natural defense > against metal toxicity) that may be associated with the > ApoE genetic defect that increases the risk of AD. > > Aluminum and Alzheimer's disease: > http://www.google.com/groups?selm=gq8havshkhetd6s78ctbgvc8iev0gtma1n%404ax.c om > > Mercury and Alzheimer's disease: > http://www.google.com/groups?selm=3af37029.2307577%40news.erols.com > > > http://IanGoddard.net/journal.htm > > "To lengthen thy life, lessen thy meals." Ben Franklin > > Ongoing CR-monkey-study update: "In the monkeys...those on > reduced feeding since the study started are dying at a rate > that is about half that of the monkeys receiving a full food > ration." Associated Press: Eating less may extend human life. > August 1, 2002 : http://www.msnbc.com/news/788746.asp?0si=- > >
Re: Iron Toxicity
Author: Ian Goddard
Date: Sun, 03 Aug 2003 19:10
Date: Sun, 03 Aug 2003 19:10
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"Virginia" <vodine@direct.ca> wrote: >I've also seen information that iron overload can cause heart problems - >hence the greater percentage of men having problems than women - as women >lose a lot of iron with their menses. IAN: Indeed, as well as being neurotoxic, iron may also play a causal role in heart disease. Anything that generates free radicals has the potential for widespread harm. From the "Nutrition Today" review: *********************************************************** [...] there is growing concern that too much iron in our diets may be related to certain diseases like cancer, cardiovascular disease, and certain neurologic diseases. [...] A 1992 prospective study[31] of Finnish men established that an elevated serum level of ferritin was a significant risk factor for acute myocardial infarction (AMI). The results of this study are consistent with a 1972 report that serum ferritin levels are positively correlated with heart disease.[32] Elevations in serum ferritin can be (but are not always) reflective of high levels of stored iron in the body. Menses in young adult women has been reported to at least partly explain why women are generally at lower risk for heart disease than men. [ IAN: The implication being that the loss of iron from menstration may reduce heart disease, as Virginia noted. Back to the review... ] Indeed, a Framingham study showed that premenopausal hysterectomy eliminated the protection against heart disease.[33] Estrogen replacement therapy alone does not decrease the risk of heart disease in women or men. Most studies on iron and heart disease focus on excess iron. Epidemiologic studies have revealed that where iron deficiency is prevalent in a population, there is a low prevalence of heart disease. Obviously, the heart requires a constant supply of iron for normal function, but there is nothing to indicate that a balanced diet will not provide sufficient iron for normal heart activity. One other area where increased iron has been considered to increase cardiovascular problems has been in association with atherogenicity of low-density lipoprotein (LDL) associated cholesterol. Earlier, we mentioned how oxidatively damaged proteins function poorly or not at all. Iron can cause oxidative damage to LDL, causing LDL to be rapidly cleared from plasma. Although at first glance, rapid removal of LDL from plasma may appear to be a positive effect, the rapid uptake appears to present problems for the endothelial cells surrounding the blood vessel. It is also thought that incomplete oxidative damage to LDL may render it less functional but also less likely to be cleared from the plasma. Iron itself can be found within atherosclerotic lesions. [...] 31. Salonen JT, Nyyssonen K, Korpela H, Tuomilehto J, Seppanen SR. High stored iron levels are associated with excess risk of myocardial infarction. Circulation 1992;86:803-11. 32. Cook JD, finch CA, Smith NJ. Evaluation of the iron status of a population. Blood 1976;48: 449-54. 33. Gordon T, Kannel WB, Hjortland MC, McNamara PM. Menopause and coronary disease: The Framingham Study. Ann Intern Med 1976;85:447-55. *********************************************************** http://web.archive.org/web/20010901081956/http://pspinformation.com/nutrition/minerals/iron.shtml >> Aluminum and Alzheimer's disease: >>http://www.google.com/groups?selm=gq8havshkhetd6s78ctbgvc8iev0gtma1n%404ax.com >> >> Mercury and Alzheimer's disease: >> http://www.google.com/groups?selm=3af37029.2307577%40news.erols.com >> >> >> http://IanGoddard.net/journal.htm >> >> "To lengthen thy life, lessen thy meals." Ben Franklin >> >> Ongoing CR-monkey-study update: "In the monkeys...those on >> reduced feeding since the study started are dying at a rate >> that is about half that of the monkeys receiving a full food >> ration." Associated Press: Eating less may extend human life. >> August 1, 2002 : http://www.msnbc.com/news/788746.asp?0si=- >> >
Re: Iron Toxicity
Author: Steve Harris
Date: Mon, 04 Aug 2003 02:52
Date: Mon, 04 Aug 2003 02:52
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"Virginia" <vodine@direct.ca> wrote in message news:viqjic7mgj9sa5@corp.supernews.com... > I've also seen information that iron overload can cause heart problems - > hence the greater percentage of men having problems than women - as women > lose a lot of iron with their menses. That's in adults. It takes a decade at least to build up that much iron. > Iron-supplemented baby formula is SCARY. Only to the uninformed. Unless you're still drinking it, my dear? Maybe giving it to hubby on the side? SBH
Re: Iron Toxicity
Author: Dr. Andrew B. Chung, MD/PhD
Date: Mon, 04 Aug 2003 05:23
Date: Mon, 04 Aug 2003 05:23
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"Steve Harris" <sbharris@ix.RETICULATEDOBJECTcom.com> wrote in message news:<bgkhp9$ojm$1@slb6.atl.mindspring.net>... > "Virginia" <vodine@direct.ca> wrote in message > news:viqjic7mgj9sa5@corp.supernews.com... > > I've also seen information that iron overload can cause > heart problems - > > hence the greater percentage of men having problems than > women - as women > > lose a lot of iron with their menses. > > That's in adults. It takes a decade at least to build up > that much iron. > > > > Iron-supplemented baby formula is SCARY. > > Only to the uninformed. Unless you're still drinking it, my > dear? Maybe giving it to hubby on the side? > > SBH Dr. Harris is correct in his assessment that growing babies need extra iron to prevent iron deficiency anemia. -- Dr. Andrew B. Chung, MD/PhD Board-Certified Cardiologist http://www.heartmdphd.com
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