Tag Archives: vitamin d toxicity



Case report: autistic child with severe vitamin D toxicity

The British Medical Journal recently reported on a vitamin D toxicity case of a four-year old child with autism.

Large study confirms the cardiovascular safety of calcium and vitamin D supplementation

A UK study of over 500,000 people found that vitamin D and calcium supplementation were not associated with cardiovascular events.

How common is vitamin D toxicity?

Dr. Cannell discusses the risk of vitamin D toxicity by reviewing statistics from the U.S.A. Poison Control Center.

Looking back: A vitamin D toxicity review from 1937

In 1937, a large study was conducted using mega doses of vitamin D to determine toxicity.


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Vitamin D safety: Risks and benefits of fortification and supplementation

Professor Reinhold Vieth wrote the seminal paper on the safety of vitamin D back in 1999. Recently, he published an updated review of vitamin D’s safety profile.

Vitamin D scientist fatality in the 30’s

In 1936, Dr Ferdinand Vowinckel was apparently experimenting on himself to see if vitamin D could cure arthritis. Reportedly, he took 2,100,000 IU/day of D2 for 18 days and died.


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A closer look: Vitamin D toxicity

Dr Cannell discusses research on vitamin D intoxication due to manufacturing errors, and the possible implications this has for further vitamin D and cancer research.


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Dear Dr Cannell: Vitamin D in the 1930’s

Dr Cannell and Dr Clark discuss toxic doses of vitamin D and the frequency of toxicity back in the 1930s.


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Professor Vieth and the vitamin D era

Dr Cannell looks back at the review which changed his life, opening his eyes to a world of vitamin D benefits.

Odd case of hypercalcemia following vitamin D supplementation

Dr. Cannell discusses the case of a 58-year-old woman who developed high blood calcium on a physiological dose of vitamin D, combined with an excessive dose of calcium.


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