Researchers had one hundred patients with congestive heart failure get their vitamin D levels tested. Only 6% were in the normal range (>30 ng/ml).
They were then supplemented with vitamin D for 4 months. The average level of vitamin D went from 12 ng/ml to 54 ng/ml.
Levels of B-type natriuretic peptide, a marker of stress on the heart, was significantly reduced along with C-reactive protein, a marker of inflammation. The subjects also saw improvement in their 6-minute walk distance.
Are you not amazed by vitamin D?
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