Vitamin D levels in your blood fall to their lowest point during flu seasons. Unable to be protected by the bodys own antibiotics (antimicrobial peptides) that are released by vitamin D, a person with a low vitamin D blood level is more vulnerable to contracting colds, influenza, and other respiratory infections.

A cardiac surgeon and Professor of Surgery at the University of Washington recommends avoiding the flu shot and taking vitamin D instead. Donald Miller, MD, says “Seventy percent of doctors do not get a flu shot.”