A new study led by researchers at the University of Copenhagen has confirmed that vitamin D plays an important role in activating immune defenses against infectious diseases like flu.
Vitamin D deficiency has already been linked to a wide spectrum of diseases including heart disease, cancer, diabetes, depression, autoimmune disease and many others.
In the case of flu fighting, Dr. John Cannell and his colleagues have reported that vitamin D helps produce antibacterial peptides that help protect against flu. That is why in winter people are prone to becoming vitamin D deficiency and getting infected with flu viruses.
Dr. Cannell, a vitamin D expert and director of Vitamin D Council, says in his newsletter sent last year that two physicians, one in Wisconsin and the other in Georgia reported to him that few of their patients/residents who maintained a high level of serum vitamin d acquired swine flu last year while many of other patients and medical workers who did not take vitamin D to maintain high vitamin D levels got swine flu and other flu viruses.