Recommended Vitamin D Intake is Too Low

2,000 IU/Day or More Needed for Optimal Health
Vitamin D has been a natural part of man's experience forever, and 90% of vitamin D is derived from solar ultraviolet-B (UVB) irradiance. The health effects of vitamin D can be and have been determined from a variety of studies including ecological, observational (case-control and cohort), and cross-sectional studies. Vitamin D helps both to prevent and to treat chronic diseases including many types of cancer, cardiovascular disease (coronary heart disease, stroke, etc.), congestive heart failure, diabetes mellitus (types 1 and 2), osteoporosis, falls, and fractures. It is also effective against infectious diseases including both bacteria and viral infections: bacterial vaginosis, pneumonia, dental caries, periodontal disease, tuberculosis, sepsis/septicemia, Epstein-Barr virus, and influenza type A such as A/H1N1 influenza. The autoimmune diseases include asthma, type 1 diabetes mellitus, multiple sclerosis, and perhaps rheumatoid arthritis.

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