2400 IU of Vitamin D is need to get most above 30 nanograms

Dietary Vitamin D Intake for the Elderly Population: Update on the Recommended Dietary Allowance for Vitamin D

Endocrinology and Metabolism Clinics of North America, online 29 September 2017, https://doi.org/10.1016/j.ecl.2017.07.003

Lynette M. Smith, PhD a, , J. Christopher Gallagher, MD: jcg@creighton.edu

No free abstract

VitaminDWiki bought the study

The following is a subset of one of their tables

The table is their analysis of data from 2 randomized controlled trials in a 1,000 different ways

The RDA gets most individuals above a vitamin D level

• “RDA is the average daily dietary intake level estimated to meet the nutrient requirements of nearly all healthy persons in a life stage and gender, that is, it meets the needs of 97.5% of individuals”

See also VitaminDWiki

• Much more than 2,000 IU of vitamin D is needed daily (Middle East studies agree) – meta-analysis Nov 2016

• Vitamin D needs in 2004:1000 IU, 10 years later same author says 3,500 IU Dr. Hollick

• Even taking as much as 4200 IU vitamin D 43 percent had less than 30 ng in blood – RCT Jan 2013

• Vitamin D Recommendations around the world - IU and ng

• Vitamin D supplementation guidelines (adults – 50,000 IU per week) – Feb 2017

• 50,000 IU of vitamin D every two weeks – Jordan conclusion - RCT July 2017

  • Every two weeks = 3,600 IU daily

• 6,000 IU needed for many to achieve 40 ng of Vitamin D - Feb 2017

• Best Vitamin D- 40 to 52 ng, achieved with 4000 – 6000 IU daily – Heaney Oct 2014

• Is 50 ng of vitamin D too high, just right, or not enough

• All items in category How Much Vitamin D items

• Review of vitamin D recommendations around the world – April 2017 has the following

  • 
  • Red = severe deficiency, must be corrected
  • Orange = mild deficiency, should be corrected
  • Green = sufficient, no more is needed
  • (Optimal is not shown)