www.GrassrootsHealth.net
Starting at 20 nanogram
1500 IU 50% chance of exceeding 40 nanogram
7400 IU 90% change of exceeding 40 nanogram
Note this chart never recommends more than 10,000 IU
Download the PDF from Vitamin D Life
See also Vitamin D Life
- One pill every two weeks gives you all the vitamin D most adults need (3600 IU daily average)
- Reasons for low response to vitamin D
- Obese need 2.5 IU of vitamin D per kg to increase 1 ng (about 3.4 X more) – RCT Sept 2013
Thus an overweight woman will need about 3.4X lager dose size
Example: 5,000 IU ==> 17,000 IU - Vitamin D level can be high, but little benefit: due to kidney, genes, low Magnesium etc.
~20% of people who get the desired nanogram level will still not get enough Vitamin D to thier cells - 3X variation in response to dose of vitamin D – meta-analysis June 2012
Wide variation in response to the identical dose - Vitamin D more than 40 ng: 1300 IU 50% chance: 5,000 IU 80% chance - Aug 2014
Also from GrassrootsHealth - Vitamin D Cofactors in a nutshell
- Too much Vitamin D can be a problem if taken for long time without cofactors
- Overview Loading of vitamin D get a good Vitamin D level in days, not months
- Vitamin D differences of 5 ng are meaningless - Aug 2015 - due to test inaccuracy, lack of consistency
- Getting Vitamin D into your body
Not limited to just Vitamin D pills - Overview Vitamin D Dose-Response which has the following chart
Summary of 8 studies - need 1800 IU for 50% chance of exceeding 40 nanogram