Vitamin D3 – Immunity, Bone Health and Depression

Scientific studies conclude the benefits of Vitamin D3 for immunity, bone health and depression

As winter approaches the lack of sunlight is making it difficult for many of us to produce enough vitamin D. Most Vitamin D is produced as a natural byproduct of the skin’s exposure to sunlight. It can also be found in fish liver oil, eggs and fatty fish such as salmon, herring and mackerel or taken as a dietary supplement.

A vitamin D deficiency may be related to many health concerns: osteoporosis, depression, heart disease, stroke, cancer, diabetes and IBD . A deficiency may show symptoms of weak bones/fractures, low energy and fatigue, lowered immunity and depression.

A study at the University of Copenhagen discovered vitamin D is crucial to help fight serious infections within the body. The T cells kill bacteria and viruses, and are activated by vitamin D. Professor Carsten Geisler from the Department of International Health, Immunology and Microbiology explains when a T cell is exposed to a foreign pathogen it begins to search for vitamin D. He remarks, “If the T cell cannot find enough vitamin D in the blood, they won’t even begin to mobilize.” This ground breaking evidence shows how vitamin D is essential for a healthy immune system.

Vitamin D may be effective in battling depression. Seasonal Affective Disorder, or SAD, is a situational mood disorder brought on by decreasing daylight in the winter months. The Vitamin D Council reports the high doses of vitamin D during these months have proven to be a very effective natural remedy for SAD. Dr. John Cannell of the Vitamin D Council has stated, “Vitamin D deficiency is but one cause of major depression; there are lots of others. However, I now recommend that anyone struggling with depression should take at least 10,000 IU/day with frequent blood tests to assure levels and monitor for toxicity.”

Science recently discovered vitamin D is beneficial in reducing the risks of osteoporosis. “A vitamin D dose of 700–800 IU a day reduced the relative risk of hip fracture by 26% and any non-vertebral fracture by 23%”, as reported by Dr. Susan E. Brown from the Center of Better Bones.

For further information the studies mentioned above and how vitamin D can help you on your journey to optimal health, visit the links below.


Vitamin D Council:

Immunity-University of Copenhagen study:

Bone Health-Center for Better Bones, Dr. Susan Brown:

IBD-L. Sacco University Hospital, Milan, Italy

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