Global Vitamin D recommendations - summer 2018

 

Can view it on Google Sheets

Compiled by Damian Ferrero    damianferrero1 at gmail.com

 Download the XLSX spreadsheet from VitaminDWiki

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4,000 IU of Vitamin D is OK - 19 organizations agree - 2018

Chart was made from data on this page

Often they state that 4,000 IU can be taken without consulting with doctor
10,000 IU daily is OK, and up to 140,000 IU if adjust cofactors

• Overview Toxicity of vitamin D has the following chart

• Examples of safe without adjusting cofactors:
  2 million IU daily for 1 week,
  200,000 IU daily for 1.5 weeks,
  150,000 IU daily for 2 weeks,
  50,000 IU daily for 5 weeks
  14,000 IU daily for 1 year

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See also VitaminDWiki

4,000 IU

• Seniors need at least 4,000 IU vitamin D, no test needed – Consensus Jan 2014
• 50,000 IU of vitamin D every two weeks – Jordan conclusion - RCT July 2017
• One pill every two weeks gives you all the vitamin D most adults need
  • 50,000 every 2 weeks = 3,600 IU (which is less than the 4,000-10,000 IU upper limits)
• Vitamin D - at least 4,000 IU to achieve 40-60 ng and reduce risk of early death – Holick June 2018
  • Note - 6,000 IU needed for many to achieve 40 ng of Vitamin D - Feb 2017

30 ng

• US admits math mistake was made in 2010 in estimating Vitamin D, but will not change recommendations – Nov 2017
  • Based on old IoM data: 3,000 IU is needed to get 97.5% of the population to 30 ng
  • Most groups consider 30 ng to be the minimim adequate amount
  • hundreds of clinical trials since the IoM report have found that 3,000 IU is not enough

40 ng

• Optimal level of vitamin D is 40 ng, 93 percent of Canadians do not have optimal levels – Oct 2017
• Vitamin D more than 40 ng: 1300 IU 50% chance: 5,000 IU 80% chance - Aug 2014
• Vitamin D recommendations by Italian Endocrinologists – 40 ng if pregnant, 30 ng if high risk – April 2018

50 ng

• Is 50 ng of vitamin D too high, just right, or not enough
• Vitamin D is needed for human fertility – goal is 50 ng – Sept 2018

Other

• Vitamin D supplementation guidelines (adults – 50,000 IU per week) – Feb 2017
• 79+ Randomized Clinical Trials with non-daily dosing
  Note: very little difference if Vitamin D is taken every day or with 16 X a dose taken every 16 days
• Review of vitamin D recommendations around the world – April 2017
• Vitamin D Recommendations around the world - IU and ng had the following old charts
  
  
  Click on image for details