Toggle Health Problems and D

7X less risk of influenza if Vitamin D levels higher than 30 ng – Oct 2017

Association of serum 25-hydroxyvitamin D with influenza in case-control study nested in a cohort of Japanese employees.

Clin Nutr. 2017 Oct;36(5):1288-1293. doi: 10.1016/j.clnu.2016.08.016. Epub 2016 Aug 26.
Nanri A1, Nakamoto K2, Sakamoto N3, Imai T4, Akter S5, Nonaka D6, Mizoue T5.


Vitamin D Hammer
15 most recently changed items in Virus category

Id Page Hits Last modification Creator Categories
11727 COVID-19 more frequent and deadly for those with dark skins (high risk of low vitamin D) 2117
01 Jul, 2020 20:50
admin Skin - Dark
11728 COVID-19 treated by Vitamin D - studies, reports, videos 5467
01 Jul, 2020 20:03
admin Virus
11821 Nursing homes could reduce risk of COVID-19 with Vitamin D – June 30, 2020 35
01 Jul, 2020 16:05
admin Seniors
High Risk
11580 COVID-19 Coronavirus can most likely be fought by Vitamin D 241961
30 Jun, 2020 22:56
admin Virus
11819 Hill's Criteria indicates that COVID-19 will be treated by Vitamin D - Annweiler June 8 2020 138
30 Jun, 2020 01:18
admin Virus
11805 Mild COVID-19 quickly treated by Zinc lozenges in 4 people – June 6, 2020 188
29 Jun, 2020 16:37
admin Immunity
11817 High-altitude Cusco, Peru has far lower rate of COVID-19 than others (high UVB and Vitamin D) - June 2020 97
28 Jun, 2020 03:05
admin Virus
2253 Flu vaccine effectiveness and side effects 11004
27 Jun, 2020 17:57
admin Virus
11813 How We can fix this pandemic in a month (Vitamin D: 20K IU for 14 days) – June 22, 2020 353
23 Jun, 2020 01:11
admin Virus
11776 Vitamin D, Quercetin, and Estradiol all increase vitamin D in cells and increase genes which reduce COVID-19 – May 21... 571
22 Jun, 2020 01:30
admin Vitamin D Receptor
11807 Vitamin D deficiency and co-morbidities in COVID-19 patients – A fatal relationship – June 7, 2020 202
18 Jun, 2020 15:55
admin Virus
11799 Lockdown lunacy: The Thinking Person’s Guide – June 04, 2020 382
11 Jun, 2020 01:37
admin Virus
11798 The role of vitamin D in reducing risk of COVID-19: a brief survey of the literature - June 9, 2020 317
11 Jun, 2020 01:09
admin Virus
11797 Evidence Supports a Causal Model for Vitamin D in COVID-19 Outcomes – June 3, 2020 275
09 Jun, 2020 21:53
admin Virus
11749 COVID-19 association with Vitamin D also being explored by Hollis and Wagner - April 2020 872
09 Jun, 2020 09:14
admin Virus

 Download the PDF from Sci-Hub via VitaminDWiki

  • Note: It appears more than 7X risk redeuction if >40 ng, but the study does not say how much
    Getting a loading dose of Vitamin D easily boosts Vitamin D levels >40ng for a few days

Several intervention studies have examined the effect of vitamin D supplementation on influenza or influenza-like illness, but their results have been inconsistent. We prospectively examined the association of serum 25-hydroxyvitamin D with influenza among Japanese workers.

We conducted a nested case-control study in a cohort of workers in 4 companies in the Kanto and Tokai areas of Japan. Physician-diagnosed influenza that occurred during the winter season was ascertained using a self-administered questionnaire. Two controls matched by company, sex, and age (and checkup date in 1 company) were selected for each case. Serum 25-hydroxyvitamin D concentrations at baseline were measured using a competitive protein binding assay. Odds ratio of influenza were estimated by conditional logistic regression with adjustment for covariates.

Of 182 cases and 364 controls, 179 cases and 353 controls with complete data were included in the analysis. Serum 25-hydroxyvitamin D concentrations were not associated with a significantly lower risk of influenza; the multivariable-adjusted odds ratio for the highest (≥30 ng/mL) versus lowest category (<20 ng/mL) was 0.77 (95% confidence interval 0.37-1.59) (P for trend = 0.80). In a subgroup of participants without vaccination, vitamin D sufficiency (≥30 ng/mL) was associated with a significantly lower risk of influenza (odds ratio 0.14; 95% confidence interval 0.03-0.74).

Overall, circulating 25-hydroxyvitamin D concentrations were not appreciably associated with influenza episodes. However, the lower influenza risk associated with vitamin D sufficiency among unvaccinated participants warrants further investigation.

Title revision of March 2020 caused the visitor count to reset.
There have actually been 4113 visitors to this page since it was originally made

7X less risk of influenza if Vitamin D levels higher than 30 ng – Oct 2017        
1090 visitors, last modified 29 Mar, 2020,
Printer Friendly PDF this page! Follow this page for updates

Attached files

ID Name Comment Uploaded Size Downloads
13537 without vaccination.jpg admin 25 Feb, 2020 18:41 34.76 Kb 959
13536 Influenza case-controlled.pdf admin 25 Feb, 2020 18:31 638.96 Kb 125
See any problem with this page? Report it (FINALLY WORKS)