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  1. 1.77 nmol response to 100 IU of Vitamin D (46 RCTs) – meta-analysis Sept 2023
  2. 10 reasons for poor response to Vitamin D (race, binding protein, etc.) – Nov 2017
  3. 200 IU needed to increase vitamin D levels by 1 ng (not 100 IU) – summary of 25 studies – Feb 2014
  4. 2700 IU of vitamin D needed to get above 20 ng if dark-skinned and high latitude – Oct 2021
  5. 30 percent of variation of vitamin D levels were associated with just 3 variables – March 2013
  6. 4700 IU of vitamin D needed by most seniors – an equation -July 2014
  7. 50,000 IU Vitamin D weekly was the most popular for Breast Cancer - May 2020
  8. 96% prediction of Vitamin D less than 20ng (not general nor cost-effective) - May 2024
  9. AI: Exciting opportunity for Vitamin D Researchers
  10. Autistics have half of the response to Vitamin D – RCT Oct 2018
  11. Children 41X more likely to be vitamin D deficient if both parents were deficient – Dec 2018
  12. D Minder: Vitamin D calculator for Smartphones and iPad
  13. Estimate Vitamin D levels based on questionnaires (12 studies) – July 2020
  14. Estrogen contraception pill doubled the response to 1,000 IU of vitamin D – RCT Sept 2017
  15. Excellent prediction of very low vitamin D in elderly from just 16 questions (analyzed by ML) – June 2017
  16. Excessive clothes and being indoors results in very low vitamin D levels – Nov 2011
  17. Free Vitamin D evaluation service
  18. Gene differences can result in 14 ng difference in vitamin D levels– Feb 2014
  19. Genes account for less than 18 percent of variation in vitamin D levels – Jan 2013
  20. Global analysis of disability - most are associated with vitamin D deficiency - Lancet Dec 2012
  21. Higher air pollution associated with 7 ng lower vitamin D levels – Aug 2013
  22. How to predict response to a vitamin D dose – RCT April 2014
  23. How you might double your response to vitamin D
  24. Huge variation in response to vitamin D supplementation – personal vitamin D response index – Dec 2016
  25. Increased Vitamin D response if take cofactors, etc
  26. Increasing the ratio of mono to poly fats increased Vitamin D levels by 6 ng – RCT Aug 2011
  27. Is a senior Vitamin D insufficient - a 2 minute questionnaire is 85 percent accurate – Nov 2019
  28. Jordanian women vitamin D – 16 ng if Western clothing – 12 ng otherwise – Aug 2011
  29. Less response to 800 IU of Vitamin D by Africans than natives in Finland – RCT March 2018
  30. Low Vitamin D during pregnancy identified with just 5 questions (for less than 12 ng) – June 2022
  31. Magnesium Deficiency Reduces Vitamin D Effectiveness- Sept 2011
  32. Magnesium may not be as available if have low stomach acid (seniors)
  33. Might be able to predict who will benefit from vitamin D by just 2 genes – July 2013
  34. Model has 80 percent chance of predicting vitamin D levels to within 10 ng – Feb 2012
  35. Molecular Approaches for Optimizing Vitamin D (one size does not fit all) – Carlberg Nov 2015
  36. Monthly vitamin D dosing had higher response than 3 per month – RCT Jan 2018
  37. Multiple Sclerosis patients need more vitamin D to get same blood level response – Aug 2015
  38. Not all Vitamin D levels follow the season – Asthma, Rhinitis, … – March 2019
  39. Obese need 2.5 IU of vitamin D per kg to increase 1 ng (about 3.4 X more) – RCT Sept 2013
  40. Obese need 2X as much vitamin D to get the same response – June 2012
  41. Obese need more Vitamin D: Volume dilution, IU per pound, or BMI – RCT Dec 2012
  42. On-line Vitamin D response simulation – July 2021
  43. Oral contraceptive use associated with higher levels of vitamin D – thesis June 2012
  44. Overview Vitamin D Dose-Response
  45. People with gut problems are low on vitamin D
  46. Poor absorption of Vitamin D is strongly related to type of gut bacteria – Dec 2020
  47. Poor CYP2R1 gene reduces blood response to Vitamin D supplementation – Aug 2019
  48. Poor response to vitamin D supplementation if poor level of B Vitamins (rats in this case) March 2021
  49. Poor responses to UV and Vitamin D were correlated to just 4 poor genes – June 2019
  50. Predict 50nmol if take 600 IU of Vitamin D for 7 months (UK, ignoring BMI, etc) – June 2024

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