# Vitamin D oversight

Page: https://stenobird.com/podcast/dr-john-campbell-7851784/vitamin-d-oversight
Text version: https://stenobird.com/podcast/dr-john-campbell-7851784/vitamin-d-oversight.md
Podcast: [Dr. John Campbell](https://stenobird.com/podcast/dr-john-campbell-7851784)
Published: 2026-07-11T11:30:00+00:00
Episode link: https://traffic.megaphone.fm/VG1919631736.mp3
Audio file: https://traffic.megaphone.fm/VG1919631736.mp3
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JSON: https://stenobird.com/v1/public/podcasts/dr-john-campbell-7851784/episodes/vitamin-d-oversight
Duration seconds: 1502

## Resource

A Statistical Error in the Estimation of the Recommended Dietary Allowance for Vitamin D (2014) https://pmc.ncbi.nlm.nih.gov/articles/PMC4210929/ US, nearly 15 times too low UK, 0ver 22 times too low IOM calculation 600 units (15 mcg), 97.5% of people will achieve 63 nmol/L (25.2 ng/ml) Correct calculation 600 units (15 mcg), 97.5% of people will achieve 26.8 nmol/L (10.7 ng/ml) Requirements based on correct calculation 8,895 IU of vitamin D per day may be needed to accomplish that 97.5% of individuals achieve serum 25(OH)D values of 50 nmol/L or more. The "Average" vs. "Individual" Mistake Canada studies Diet gives 232 IU of vitamin D per day Institute of Medicine (IOM), RDA vitamin D 600 IU per day, (aged 1 to 70 years) Now called the National Academy of Medicine https://nam.edu UK is even worse https://www.nhs.uk/conditions/vitamins-and-minerals/vitamin-d/ UK, 400 iu or 10 mcg 600 iu per day to achieve serum 25-hydroxyvitamin D (25(OH)D) levels of 50 nmol/L or more in 97.5% of healthy individuals. Levels of 50 nmol/L or more have been shown to benefit bone health and to prevent disease and injury. The IOM based their RDA for vitamin D on an aggregation of 10 supplementation studies, (32 dose protocols) carried out during winter months, at locations above 50th parallel IOM regressed the 32 study averages, dose: plasma ratio On the basis of this, IOM estimated that 600 IU of vitamin D would achieve an average 25(OH)D level of 63 nmol/L Requirements based on correct calculation 8,895 IU of vitamin D per day This dose is well in excess of the current RDA of 600 IU per day and the tolerable upper intake of 4000 IU per day. The public health and clinical implications of the miscalculated RDA for vitamin D are serious. With the current recommendation of 600 IU, bone health…

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