Vitamin D levels were measured in ninety patients with chronic heart failure and thirty-one control patients without heart disease.
Vitamin D levels were much lower in those with heart failure than controls.
Specifically, an astounding 98% of the patients with heart failure had a vitamin D deficiency defined by vitamin D levels below 75 nmol/L and severe deficiency (less than 25 nmol/L) occurred in 67% of the patients.
These results mimic observations seen in animal studies that demonstrated vitamin D supplementation can prevent heart failure in rats. (Nutrition, Metabolism and Cardiovascular Disease, November 2010)
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