Many doctors still belief (incorrectly) that more than 800 or 2000 IU of vitamin D is toxic - Oct 2014

How do primary care physicians and practitioners view and implement vitamin D in their practice? Vitamin D Council

Four themes found

1. The primary driver of demand is the patient
2. Reflexive acceptance of patient demand without additional investigation
3. Incorporation into patient care as a diagnostic tool
4. Doubt – “A substantial number of participants viewed the patient-driven demand for vitamin D testing and treatment with skepticism.”

Based on the following study

Emerging Practice Concerning Vitamin D in Primary Care
Publisher wants $30 for the PDF

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See also VitaminDWiki

• 1000 IU of vitamin D (per kg) can indeed be toxic – 1947
  this may have been the source of error for the past 60 years - forgot the per kg)
• 10,000 IU vitamin D daily is safe, toxicity start at 150 ng (for monotherapy)– Jan 2013
• 56 suppliers of 10000 IU vitamin D – yet 2000 IU toxicity claim persists Oct 2010
• NHS (UK) mistakenly says more than 1000 IU of vitamin D can be harmful – Dec 2013
• Overview Toxicity of vitamin D which includes the following
  Many studies have shown: No toxicity <30,000 IU