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1 in 5 Canadians have inadequate Vitamin D (less than 16 ng), far more if dark skinned – Canada April 2023


Vitamin D Status of People 3 to 79 Years of Age from the Canadian Health Measures Survey 2012-2019

J Nutr. 2023 Apr;153(4):1150-1161. doi: 10.1016/j.tjnut.2023.02.026
Hope A Weiler 1, Kurtis Sarafin 2, Chantal Martineau 3, Janice L Daoust 3, Krista Esslinger 4, Linda S Greene-Finestone 5, Lidia Loukine 6, Veronique Dorais 6

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Background: Vitamin D is recognized in bone health and the prevention of rickets and osteomalacia.

Objective: This study aimed to assess vitamin D status of people in Canada and to identify factors associated with vitamin D inadequacy and deficiency.

Methods: Serum 25-hydroxyvitamin D (25(OH)D) from the Canadian Health Measures Survey (cycles 3-6, n = 21,770, 3-79 y) were evaluated for geometric means and proportions <40 (inadequate) and <30 (risk of deficiency) nmol/L. Factors associated with inadequacy or deficiency were tested using logistic regression.

Results: Mean serum 25(OH)D was 57.9 (95% CI: 55.4, 60.5) nmol/L; the

  • prevalence of inadequacy was 19.0% (95% CI: 15.7, 22.3) and
  • risk of deficiency was 8.4% (95% CI: 6.5, 10.3).

Prominent dietary factors associated with inadequacy in adults included:

  • not consuming fish compared with ≥1/wk (adjusted ORadj: 1.60; 95% CI: 1.21, 2.11),
  • none compared with ≥1/d for cow's milk (ORadj: 1.41; 95% CI: 1.02, 1.94) or
  • margarine (ORadj: 1.42; 95% CI: 1.08, 1.88); or
  • nonuser compared with user of vitamin D supplements (ORadj: 5.21; 95% CI: 3.88, 7.01).

Notable demographic factors included:

  • younger adults compared with 71 to 79 y (19-30 y ORadj: 2.33; 95% CI: 1.66, 3.29);
  • BMI ≥30 compared with <25 kg/m2 (ORadj: 2.30; 95% CI: 1.79, 2.95);
  • lower household income quartile 1 compared with 4 (ORadj: 1.46; 95% CI: 1.00, 2.15); and

self-reported

  • Black (ORadj: 8.06; 95% CI: 4.71, 13.81),
  • East/Southeast Asian (ORadj: 3.83; 95% CI: 2.14, 6.85),
  • Middle Eastern (ORadj: 4.57; 95% CI: 3.02, 6.92), and
  • South Asian (ORadj: 4.63; 95% CI: 2.62, 8.19) race compared with White.

Similar factors were observed in children and for deficiency.

Conclusions: Most people in Canada have adequate vitamin D status; nonetheless, racialized groups have an elevated prevalence of inadequacy. Further research is required to evaluate if current strategies to improve vitamin D status, including increasing vitamin D in fortified foods and supplements, and dietary guidance to include a source of vitamin D every day help to reduce health inequality in Canada.
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VitaminDWiki – Overview Deficiency of vitamin D contains

FACT: Much of the world is now vitamin D deficient
OBSERVATION:There are many reasons that a person may be vitamin D deficient
11 of the reasons for the epidemic are new in the past 40 years, Example: Air Conditioning
OBSERVATION: The more reasons that apply to an individual, the more likely he is to be deficient (additive reasons)
FACT: Vitamin D Deficiency has been associated with many diseases

FACT: Vitamin D intake can be increased by supplements, injection, UV, and sun (very little by food) 111 items

FACT: Adding vitamin D to diets has been proven E1 E2 in clinical trials to both PREVENT some and TREAT some diseases
OBSERVATION: Adding vitamin D (intervention) does PREVENT and TREAT additional diseases - more trials are underway
OBSERVATION: There are at least 10 ways to increase the response by the blood to vitamin D intake

Details at VitaminDWiki

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from DSM

DSM 2014


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

Attached files

ID Name Comment Uploaded Size Downloads
19487 C less than 40 nmol.jpg admin 19 Apr, 2023 13:17 48.86 Kb 65
19486 Canadian Vitamin D.ethnic etc.pdf PDF 2023 admin 19 Apr, 2023 13:17 463.10 Kb 30