Wednesday, April 15, 2020

Vitamin D Supplements Could Reduce Risk of Influenza and COVID-19 Infection and Death


Orthomolecular Medicine News Service, Apr 9, 2020

Vitamin D Supplements Could Reduce Risk of Influenza and COVID-19 Infection and Death

by William B. Grant, PhD and Carole A. Baggerly

(OMNS Apr 9, 2020) There are two main reasons why respiratory tract infections such as
influenza and COVID-19 occur in winter: winter sun and weather and low vitamin D status.
Many viruses live longer outside the body when sunlight, temperature, and humidity levels
are low as they are in winter [1].Vitamin D is an important component of the body's immune
 system, and it is low in winter due to low solar ultraviolet-B (UVB) doses from exposure
and the low supplement intakes of most. While nothing can be done about winter sun
and weather, vitamin D status can be raised through vitamin D supplements.
Vitamin D has several mechanisms that can reduce risk of infections [2]. Important
 mechanisms regarding respiratory tract infections include:
  • inducing production of cathelicidins and defensins that can lower viral 
  • survival and replication rates as well as reduce risk of bacterial infection
  • reducing the cytokine storm that causes inflammation and damage to
  •  the lining of the lungs that can lead to pneumonia and acute respiratory distress syndrome.
Vitamin D deficiency has been found to contribute to acute respiratory distress
syndrome, a major cause of death associated with COVID-19 [3]. An analysis of
case-fatality rates in 12 U.S. communities during the 1918-1919 influenza pandemic
 found that communities in the sunny south and west had much lower case-fatality
rates (generally from pneumonia) than those in the darker northeast [4].
To reduce risk of infection, it is recommended that people at risk of influenza and/or
COVID-19 consider taking 10,000 IU/day (250 micrograms/day) of vitamin D for
a few weeks to rapidly raise 25-hydroxyvitamin D [25(OH)D] concentrations,
followed by at least 5000 IU/day. The goal should be to raise 25(OH)D concentrations
above 40-60 ng/ml (100-150 nmol/l), taking whatever is necessary for that individual
 to achieve and maintain that level.
For treatment of people who become infected with COVID-19, higher vitamin D doses
 would be required to rapidly increase 25(OH)D concentrations.
Vitamin D is an inactive, pro-hormone which is also considered a seasonal, 'conditional'
 vitamin as vitamin D is not usually produced by the skin during the winter or when
 people are inside or covered up in the summer. Vitamin D is produced through the
action of UVB radiation on 7-dehydrocholesterol in the skin followed by a thermal
reaction. It then enters the blood stream and when it reaches the liver, it receives a
hydroxyl group and becomes 25(OH)D. This is the circulating metabolite that is
 measured to determine vitamin D status [25(OH)D concentration]. This metabolite
is essentially inert, but is converted in the kidneys to 1,25(OH)2D (calcitriol) for
 circulation in the blood, where it helps regulate serum calcium concentrations.
 Other organs can also convert 25(OH)D to calcitriol as needed, such as to fight
 cancer. Most of the effect of vitamin D is mediated by calcitriol entering vitamin D
 receptors (VDRs) attached to chromosomes in nearly every cell in the body,
 resulting in many genes being up- or down-regulated.
An adequate magnesium level is required for the activation of 25(OH)D [5]. Since
many people in our modern society are deficient, along with supplements of vitamin D,
 magnesium supplements (300-400 mg/d, in citrate, chloride or malate form) should
 be considered. Data from voluntary participants in GrassrootsHealth.net's 25(OH)D
concentration measurement program found that taking magnesium supplements
was equivalent to taking ~400 IU/d more vitamin D supplementation. [6]
While the initial classical role of vitamin D is to regulate calcium and phosphate absorption
and metabolism, vitamin D has many non-skeletal effects. Many of the effects are known
 from observational studies in which serum 25(OH)D concentrations for those with or
without specific diseases or conditions are compared statistically. Such studies generally
find that concentrations above 30 to 50 ng/ml (75 to 125 nmol/l) are associated with
 lower risk of disease than concentrations below 10-20 ng/ml, such as cancer, cardiovascular
disease, diabetes mellitus, etc. [7]. Two large-scale randomized controlled trials (RCTs)
did find significant reductions in incidence and mortality rates for cancer and progression
from prediabetes to diabetes in the secondary analyses [8].
At this point, what is needed are quickly developed public health studies to evaluate the
effect on preventing COVID-19 in the populations that achieved the recommended serum
 concentrations. Another critically important project would be to evaluate the serum 25(OH)D
 concentrations of those who develop severe symptoms of COVID-19 infection. Achieved 25(OH)D
 concentrations should be measured.
Medical systems generally require randomized controlled trials (RCTs) that investigate
effectiveness and risks before accepting what they consider a novel treatment. This requirement
is problematic for vitamin D since most RCTs conducted to date have not followed Heaney's
 guidelines for all nutrient studies:
Heaney's guidelines [9], applied to vitamin D:
  1. Basal 25(OH)D must be measured, used as an inclusion criterion for entry into study, and recorded in the report of the trial.
  2. Vitamin D supplementation must be large enough to change vitamin D status and must be measured.
  3. The change in 25(OH)D produced in those enrolled in the trials must be measured and recorded in the report of the trial.
  4. The hypothesis to be tested must be that a change in 25(OH)D (not just a change in vitamin D intake) produces the sought-for effect.
  5. Conutrient status must be optimized in order to ensure that the test nutrient is the only nutrition-related, limiting factor in the response
Open-label field trials based on Heaney's guidelines have found significantly reduced risk
 of disease such as breast cancer [10].
Regarding the safety of high-dose vitamin D supplementation, the abstract of a recent
article [11] stated:
"During this time, we have admitted over 4700 patients, the vast majority of whom 
agreed to supplementation with either 5000 or 10,000 IUs/day. Due to disease concerns, 
a few agreed to larger amounts, ranging from 20,000 to 50,000 IUs/day. There have 
been no cases of vitamin D3 induced hypercalcemia or any adverse events attributable
 to vitamin D3 supplementation in any patient." In addition, many reviews have reported
that vitamin D supplementation is safe.
The studies that aim to provide whatever intake is necessary to obtain a serum level
 between 40- 60 ng/ml (100-150 nmol/L) have shown a wide range of responses to
a specific vitamin D intake. Thus, it is necessary to measure 25(OH)D concentrations
at the start of vitamin D supplementation and after supplementing for a 2-3 months.
Hypercalceima is the only significant risk [12], but generally does not occur below
150 ng/ml (375 nmol/l) and can be easily treated by stopping supplementation at that time.
The groups for whom it is most important to take vitamin D supplements during the
 current COVID-19 pandemic are health care providers and first responders. [13]
It should be noted that treatment of those with COVID-19 has several goals: (1) reduce
 the symptoms; (2) overcome the adverse effects of the infection such as impaired
oxygen uptake due to pneumonia; (3) if possible, reduce survival and replication
of the virus; (4) keep the patient alive long enough so that the body's immune system
can overcome the infection. As discussed in a recent review, the complex, integrated
immune system needs multiple specific micronutrients, including vitamins
A, D, C, E, B6, and B12, folate, zinc, iron, copper, and selenium, which play vital,
often synergistic roles at every stage of the immune response. Micronutrients
with the strongest evidence for immune support are vitamins C and D and zinc.
Available evidence indicates that supplementation with multiple micronutrients
with immune-supporting roles may modulate immune function and reduce the
 risk of infection [14]. Thus, more attention should be paid to supporting the
 immune system when treating COVID-19 patients.
Data from GrassrootsHealth.net volunteers underscores the interdependence of
 various supplements that affect immunity. Participants taking approximately
 1000 mg/d vitamin C achieved a 25(OH)D concentration of 40 ng/ml with
 586 IU/d lower vitamin D supplementation. [15]
Results for effects on 25(OH)D for vitamins B6, B12, K2, and calcium are
 available at GrassrootsHealth.net.
(William B. Grant, PhD, may be reached at Williamgrant08@comcast.net and
 Carole A. Baggerly at carole@grassrootshealth.org )

References

1. Aldridge RA, Lewer D, Beale S, et al. (2020) Seasonality and immunity to laboratory-confirmed seasonal coronaviruses (HCoV-NL63, HCoV-OC43, and HCoV-229E): results from the Flu Watch cohort study [version 1; peer review: awaiting peer review] 30 March 2020. https://wellcomeopenresearch.org/articles/5-52/v1
2. Grant WB, Lahore H, McDonnell SL, Baggerly CA, French CB, Aliano JA, Bhattoa HP. (2020) Evidence that vitamin D supplementation could reduce risk of influenza and COVID-19 infections and deaths. Nutrients. 12: 988. https://www.mdpi.com/2072-6643/12/4/988
3. Dancer RC, Parekh D, Lax S, D'Souza V, Zheng S, Bassford CR, et al. (2015) Vitamin D deficiency contributes directly to the acute respiratory distress syndrome (ARDS). Thorax. 70:617-624. http://thorax.bmj.com/cgi/pmidlookup?view=long&pmid=25903964
4. Grant WB, Giovannucci E. (2009) The possible roles of solar ultraviolet-B radiation and vitamin D in reducing case-fatality rates from the 1918-1919 influenza pandemic in the United States. Dermatoendocrinol. 1:215-219. http://www.tandfonline.com/doi/full/10.4161/derm.1.4.9063
5. Uwitonze AM, Razzaque MS. (2018) Role of magnesium in vitamin D activation and function. J Am Osteopath Assoc. 118:181-189. https://jaoa.org/article.aspx?articleid=2673882
6. GrassRoots Health Research Institute. (2020) Are both supplemental magnesium and vitamin K2 combined important for vitamin D levels? https://www.grassrootshealth.net/blog/supplemental-magnesium-vitamin-k2-combined-important-vitamin-d-levels
7. Rejnmark L, Bislev LS, Cashman KD, Eir¡ksdottir G et al. (2017) Non-skeletal health effects of vitamin D supplementation: A systematic review on findings from meta-analyses summarizing trial data. PLoS One. 12(7):e0180512. http://dx.plos.org/10.1371/journal.pone.0180512
8. Grant WB, Boucher BJ. (2019) Why secondary analyses in vitamin D clinical trials are important and how to improve vitamin D clinical trial outcome analyses - A comment on "extra-skeletal effects of vitamin D. Nutrients. 11(9). pii: E2182. https://www.mdpi.com/2072-6643/11/9/2182
9. Heaney RP. (2014) Guidelines for optimizing design and analysis of clinical studies of nutrient effects. Nutr Rev.72:48-54. https://onlinelibrary.wiley.com/doi/pdf/10.1111/nure.12090
10.McDonnell SL, Baggerly CA, French CB, Baggerly LL, Garland CF et al. (2018) Breast cancer risk markedly lower with serum 25-hydroxyvitamin D concentrations ò60 vs < 20 ng/ml (150 vs 50 nmol/L): Pooled analysis of two randomized trials and a prospective cohort. PLoS One. 13(6):e0199265. http://dx.plos.org/10.1371/journal.pone.0199265
11. McCullough PJ, Lehrer DS, Amend J. (2019) Daily oral dosing of vitamin D3 using 5000 TO 50,000 international units a day in long-term hospitalized patients: Insights from a seven year experience. J Steroid Biochem Mol Biol. 189:228-239. https://www.ncbi.nlm.nih.gov/pubmed/30611908
12. Malihi Z, Wu Z, Lawes CMM, Scragg R. (2019) Adverse events from large dose vitamin D supplementation taken for one year or longer. J Steroid Biochem Mol Biol. 188:29-37. https://www.sciencedirect.com/science/article/abs/pii/S0960076018304692?via%3Dihub
13. Grant WB. (2020) Re: Preventing a covid-19 pandemic: Can vitamin D supplementation reduce the spread of COVID-19? Try first with health care workers and first responders. BMJ, 368:m810. https://www.bmj.com/content/368/bmj.m810/rr-42
14. Gombart AF, Pierre A, Maggini S. (2020) A review of micronutrients and the immune system-working in harmony to reduce the risk of infection. Nutrients 12(1). pii: E236. http://www.mdpi.com/resolver?pii=nu12010236
15. GrassRoots Health Research Institute. (2020) Is supplemental vitamin C important for vitamin D levels? https://www.grassrootshealth.net/blog/supplemental-vitamin-c-important-vitamin-d-levels

Related publications

Grant WB, Al Anouti F, Moukayed M. (2020) Targeted 25-hydroxyvitamin D concentration measurements and vitamin D3 supplementation can have important patient and public health benefits. Eur J Clin Nutr. 74:366-376. http://dx.doi.org/10.1038/s41430-020-0564-0
Grant WB, Boucher BJ, Bhattoa HP, Lahore H. (2018) Why vitamin D clinical trials should be based on 25-hydroxyvitamin D concentrations. J Steroid Biochem Mol Biol. 177:266-269. https://core.ac.uk/download/pdf/161069124.pdf
McNamara L. (2020) COVID-19: Fighting fear and the coronavirus pandemic with precautions and quality supplements. https://laddmcnamara.com/2020/03/13/covid-19-fighting-fear-and-the-coronavirus-pandemic-with-precautions-and-quality-supplements
Laird E, Kenny EA. (2020) Vitamin D deficiency in Ireland - implications for COVID-19. Results from the Irish Longitudinal Study on Ageing (TILDA). https://tilda.tcd.ie/publications/reports/pdf/Report_Covid19VitaminD.pdf
McCartney DM, Byrne DG. (2020) Optimisation of vitamin D status for enhances immune-protection against COVID-19. Irish Med J.113:P58. http://imj.ie/wp-content/uploads/2020/04/Optimisation-of-Vitamin-D-Status-for-Enhanced-Immuno-protection-Against-Covid-19.pdf
Schwalfenberg GK. (2020) Rapid Response: Covid 19, Vitamin D deficiency, smoking, age and lack of masks equals the perfect storm. BMJ, 368:m810. https://www.bmj.com/content/368/bmj.m810/rr-44
Wimalawansa SJ. (2020) Global epidemic of coronavirus - COVID-19: What we can do to minimize risks. Eur J Biomedical Pharmaceutical Sci. 7:432-438.

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