Remy
Administrator
Here's an interesting article on iron...it's long, but Chris Kresser and Morley Robbins have both provided more concise summaries.
Basically, the gist of it all is that supplementing iron to get ferritin levels up over 50, as advocated by many thyroid groups, may really be creating a toxic iron overload state and a deficiency of magnesium and bioavailable copper due to low ceruloplasmin. Taking iron supplements will only worsen this situation and won't actually improve health or vitality.
Longevity studies have apparently consistently found that ferritin levels over 50 are associated with higher mortality. Cardiologists may regularly prescribe blood donation, especially to men or post-menopausal women, because having lower iron levels is better for heart function.
Interestingly enough, Morley Robbins also suggests that gluten isn't actually the problem for many people with non-celiac gluten intolerance...it may actually be the iron that is added to the wheat flour that is causing issues for people. Did you know that you can pick up cereal with a magnet due to the added iron fillings? Yuck. You can see the iron fillings in a typical supplement capsule too.
So toxic iron levels are also associated with many conditions related to MECFS including infections, metabolic disease like diabetes/metabolic syndrome, and even histamine overload because bioavailable copper is required for DAO, MAO and NHMT (the enzymes that metabolizes histamine) to work properly. Morley Robbins also links excess toxic iron to MTHFR mutations and estrogen dominance.
Personally, I don't think many people at all should or need to be taking iron supplements. I think iron deficiency is often misdiagnosed and is either the anemia of chronic disease (for which taking iron supplements can actually prove fatal) or is actually in toxic overload in the liver for the reasons stated above.
Basically, the gist of it all is that supplementing iron to get ferritin levels up over 50, as advocated by many thyroid groups, may really be creating a toxic iron overload state and a deficiency of magnesium and bioavailable copper due to low ceruloplasmin. Taking iron supplements will only worsen this situation and won't actually improve health or vitality.
Longevity studies have apparently consistently found that ferritin levels over 50 are associated with higher mortality. Cardiologists may regularly prescribe blood donation, especially to men or post-menopausal women, because having lower iron levels is better for heart function.
Interestingly enough, Morley Robbins also suggests that gluten isn't actually the problem for many people with non-celiac gluten intolerance...it may actually be the iron that is added to the wheat flour that is causing issues for people. Did you know that you can pick up cereal with a magnet due to the added iron fillings? Yuck. You can see the iron fillings in a typical supplement capsule too.
So toxic iron levels are also associated with many conditions related to MECFS including infections, metabolic disease like diabetes/metabolic syndrome, and even histamine overload because bioavailable copper is required for DAO, MAO and NHMT (the enzymes that metabolizes histamine) to work properly. Morley Robbins also links excess toxic iron to MTHFR mutations and estrogen dominance.
Personally, I don't think many people at all should or need to be taking iron supplements. I think iron deficiency is often misdiagnosed and is either the anemia of chronic disease (for which taking iron supplements can actually prove fatal) or is actually in toxic overload in the liver for the reasons stated above.
Background
The production of peroxide and superoxide is an inevitable consequence of aerobic metabolism, and while these particular 'reactive oxygen species' (ROSs) can exhibit a number of biological effects, they are not of themselves excessively reactive and thus they are not especially damaging at physiological concentrations. However, their reactions with poorly liganded iron species can lead to the catalytic production of the very reactive and dangerous hydroxyl radical, which is exceptionally damaging, and a major cause of chronic inflammation.
Review
We review the considerable and wide-ranging evidence for the involvement of this combination of (su)peroxide and poorly liganded iron in a large number of physiological and indeed pathological processes and inflammatory disorders, especially those involving the progressive degradation of cellular and organismal performance. These diseases share a great many similarities and thus might be considered to have a common cause (i.e. iron-catalysed free radical and especially hydroxyl radical generation).
The studies reviewed include those focused on a series of cardiovascular, metabolic and neurological diseases, where iron can be found at the sites of plaques and lesions, as well as studies showing the significance of iron to aging and longevity. The effective chelation of iron by natural or synthetic ligands is thus of major physiological (and potentially therapeutic) importance. As systems properties, we need to recognise that physiological observables have multiple molecular causes, and studying them in isolation leads to inconsistent patterns of apparent causality when it is the simultaneous combination of multiple factors that is responsible.
This explains, for instance, the decidedly mixed effects of antioxidants that have been observed, since in some circumstances (especially the presence of poorly liganded iron) molecules that are nominally antioxidants can actually act as pro-oxidants. The reduction of redox stress thus requires suitable levels of both antioxidants and effective iron chelators. Some polyphenolic antioxidants may serve both roles.
Understanding the exact speciation and liganding of iron in all its states is thus crucial to separating its various pro- and anti-inflammatory activities. Redox stress, innate immunity and pro- (and some anti-)inflammatory cytokines are linked in particular via signalling pathways involving NF-kappaB and p38, with the oxidative roles of iron here seemingly involved upstream of the IkappaB kinase (IKK) reaction. In a number of cases it is possible to identify mechanisms by which ROSs and poorly liganded iron act synergistically and autocatalytically, leading to 'runaway' reactions that are hard to control unless one tackles multiple sites of action simultaneously. Some molecules such as statins and erythropoietin, not traditionally associated with anti-inflammatory activity, do indeed have 'pleiotropic' anti-inflammatory effects that may be of benefit here.
Conclusion
Overall we argue, by synthesising a widely dispersed literature, that the role of poorly liganded iron has been rather underappreciated in the past, and that in combination with peroxide and superoxide its activity underpins the behaviour of a great many physiological processes that degrade over time. Understanding these requires an integrative, systems-level approach that may lead to novel therapeutic targets.