From an article by Integrative Medicine Vol. 9, No. 1, Feb/Mar 2010. The researcher was Joseph Pizzorno, ND, Editor in Chief.
Approximately 50% of the healthy North American population and more than
80% of those with chronic diseases are vitamin D deficient.
Vitamin D deficiency is linked to:
Osteoporosis
Cardiovascular disease
Cancer
Autoimmune diseases
Multiple sclerosis
Pain
Loss of Cognitive function
Decreased strength
Increased rate of all-cause mortality
How much to take?
According to the article: A loading dose of supplemental vitamin D3 of 10,000 IU/day for 3 months
and maintenance dose of 5,000 IU/day “is not enough for most people in northern
climes.”