John D Day MD

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John D. Day, MD, specializes in heart rhythm disorders at the Intermountain Medical Center Heart Institute. He is the upcoming president of the Heart Rhythm Society and is the editor-in-chief of the Journal of Innovations in Cardiac Rhythm Management. He has published over 100 medical articles and has an upcoming book entitled “The Longevity Plan: Lessons Learned from China’s Longevity Village on How to Lose Weight, Feel Great, and Live Healthy to 110.”

Getting Vitamin D during the dead of winter

By John D Day MD
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The noon-day sun is the number one source of our vitamin D. But in the dead of winter it's too cold to go outside, the sun is too low in the sky, and these inversions block out the sun's rays. As a heart rhythm specialist at the Intermountain Medical Center Heart Institute, here's why vitamin D matters, and how you can get it during the winter season.​​​​