Meta-analysis associates increased magnesium intake with reduction in diabetes risk

Tuesday, January 26, 2016

The results of a meta-analysis reported in the July 2015 issue of Biomedical and Environmental Sciences add more evidence in support of a relationship between higher magnesium intake and a lower risk of developing type 2 diabetes.

Researchers at China's Nantong University selected 15 articles that reported the results of 19 prospective studies examining the effect of dietary or dietary plus supplemental magnesium on type 2 diabetes incidence among a total of 539,735 men and women. Type 2 diabetes developed in 25,252 subjects over follow-up periods that ranged from four to twenty years.

According to authors Tian Xu and colleagues, the protective effect of magnesium on diabetes is believed to be mediated through glucose homeostasis. Magnesium deficiency is thought to damage beta-cells, thereby affecting insulin production. In addition, magnesium supplementation has been shown to prevent fructose-induced insulin insensitivity. They add that intervention trials have shown that magnesium supplementation improved insulin sensitivity, and reduced insulin resistance and plasma fasting glucose levels in diabetics and nondiabetics alike.

"The present meta-analysis of prospective cohort studies further verified a protective effect of magnesium intake on type 2 diabetes in a nonlinear dose-response manner," the authors conclude. "Increasing magnesium intake especially in those with low basic level would make a beneficial contribution to control type 2 diabetes risk in general population."

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Higher magnesium levels linked to lower risk of stroke
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Findings derived from the Nurses' Health Study suggest a protective effect for magnesium against the risk of ischemic stroke in women.

The study, described in the October 2014 issue of the American Heart Association journal Stroke, included 459 Nurses' Health Study participants who experienced an ischemic stroke prior to June 2006 and an equal number of control subjects matched for age, ethnicity and other factors. Blood samples collected between 1989 and 1990 were analyzed for plasma magnesium.

Subjects whose magnesium levels were among the lowest fifth of participants had a risk of stroke that was 34% higher than those whose levels were among the top fifth. Those whose levels were lower than 0.82 micromoles per liter had a 57% greater risk of total ischemic stroke, and a 66% higher risk of thrombotic stroke than women who had higher levels.

To authors Sally N. Akarolo-Anthony and her associates' knowledge, the association between magnesium levels and ischemic stroke risk has been evaluated in only one other prospective study. They remark that although only 1% of the body's magnesium exists in plasma, levels are strongly correlated with intracellular magnesium and could be a better indicator of the mineral's status than dietary intake. They note that risk factors for stroke, including diabetes and hypertension, have been associated with reduced magnesium levels, and that there is evidence that magnesium could help protect against blood clot formation.

"The results of this study suggest that low plasma magnesium may be associated with increased risk of ischemic stroke," the authors conclude. "If confirmed, our findings may have significant public health impact because magnesium deficiency is potentially modifiable."

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Life Extension Magazine® February 2016 Issue Now Online

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Shilajit boosts CoQ10 efficiency, by Jonathan Stoddard


Beauty from within: Healthy hair skin and nails, by Marcus Phillips

Slow the progression of atherosclerotic plaque, by Roger Alvarez

Prevent age-related vision loss, by Edward Rosick, DO, MPH, DABIHM

Environmental toxins and cancer risk, by Stephanie Westfall

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Health Concern


Type 2 diabetes, formerly known as non-insulin-dependent diabetes, occurs when the body is no longer able to use insulin effectively and gradually becomes resistant to its effects. It is a slowly progressing disease that goes through identifiable stages. In the early stages, both insulin and glucose levels are elevated (conditions called hyperinsulinemia and hyperglycemia, respectively). In the later stages, insulin levels are reduced, and blood glucose levels are very elevated. Although few people are aware of this crucial distinction, therapy for type 2 diabetes should be tailored to the stage of the disease.

Risk factors for type 2 diabetes include aging, obesity, family history, physical inactivity, ethnicity, and impaired glucose metabolism. Type 2 diabetes is also a prominent risk of metabolic syndrome, a constellation of conditions that includes insulin resistance along with hypertension, lipid disorders, and overweight.

Diabetics are often deficient in magnesium, which is depleted by medications and the disease process (Eibl 1995; Elamin 1990; Tosiello 1996). One double-blind study suggested that magnesium supplementation enhanced blood sugar control (Rodriguez-Moran 2003).

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