Vitamin d deficiency common in heart failure patients – does supplementation help?

This study looked at how common vitamin D deficiency is in people with chronic heart failure and whether giving vitamin D supplements improves their health. 91 adults with heart failure were divided into groups based on their vitamin D levels. Those with severe deficiency were randomly chosen to receive vitamin D or no treatment. Researchers tracked hospital visits, deaths, and lab results over 26 months to see if supplements made a difference.