The products and the claims made about specific products on this site have not been evaluated by the United States Food and Drug Administration and are not intended to diagnose, treat, cure or prevent disease. The information provided on this site is for informational purposes only and is not intended as a substitute for advice from your physician or other health care professional. You should consult with a healthcare professional before starting any diet, exercise or supplementation program, before taking any medication, or if you have or suspect you might have a health problem.
             The list of conditions associated with Vitamin D3 deficiency has increased dramatically in recent years.                     Click on the links on the left or below to see summaries of the data, or a selection of recommended Vitamin D3 products and test kits.

             ​Summary of Vitamin D3 Benefits (recommended)       
            Cancer Prevention
            Cancer Treatment
Heart disease and hypertension
  • Rheumatoid arthritis
  • Mental illness
  • Chronic pain
  • Inflammatory bowel disease
Vitamin D deficiency is a worldwide epidemic
  Vitamin D3 World- The best source of information and supplies of Vitamin D3 products and test kits         
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.Oliver Gillie, in Memorandum










This website was established over a decade ago in collaboration with Oliver Gillie, one of the first and strongest advocates of Vitamin D. Oliver sadly passed away May 2021 at the age of 83. Gillie held a doctorate in genetics from Edinburgh University before embarking on his medical journalistic career that lasted over more than 40 years. Early on his career he became fascinated with the role and Vitamin D and the consequences of deficiency. He was responsible for describing the “Scottish Effect” arguing that many of the health problems in Scotland were a result of the constant cloud cover which prevents the production of Vitamin D. Today, thanks largely to Gillie’s work, the Scottish government recommends that everyone, including children, should take Vitamin D supplements, especially during the low-sunlight months from October to March. We are glad to continue the work that he was so pivotal in starting.