Canadian Vitamin D recommendations not updated in 13 years - March 2023

---

Canada

Canadian DRI

---

700+ studies since 2009 have found that much more vitamin D is needed

More than 700 Intervention Trials in VitaminDWiki since the IoM decision
Intervention - Vitamin D by date

---

Sample of studies in VitaminDWiki

• Third study found that Infants needed 1600 IU of vitamin D – JAMA RCT May 2013
  • Yet Canada still says that 400 IU is enough for virtually everyone
• 2400 IU of vitamin D needed to get most Northern adults above 20 ng – June 2020
• 10,000 IU of Vitamin D for 7 years with no excessive Calcium in 4,800 patients – Dec 2018
• Vitamin D - at least 4,000 IU to achieve 40-60 ng and reduce risk of early death – Holick June 2018
• Vitamin D supplementation guidelines (adults – 50,000 IU per week) – Feb 2017
• Vitamin D math mistake had been made, adults need at least 8000 IU – July 2017
  • they admitted their mistake, but did not charge their report, which Canada and many other countries copied
• 1000 IU should be the new vitamin D RDA (if you think 20 ng is enough) - May 2017
• Overview Deficiency of vitamin D
• Overview How Much vitamin D
• Vitamin D levels have been crashing since 1995 (Polish Children, Elite Military, etc)

Note: Many studies have also concluded that Vitamin D needed is proportional to weight

---

VitaminDwiki - How Much Vitamin D contains

345 items in the category

See also

• Optimum category listing has 99 items along with related searches
• Toxicity of Vitamin D category listing has 108 items along with related searches
• Calcium category listing has 228 items along with related searches
• Increased use of D category listing has 55 items along with related searches
• Consensus Vitamin D category listing has 71 items along with related searches