• Prevention of covid-19 and other acute respiratory infections with cod liver oil supplementation, a low dose vitamin D supplement: quadruple blinded, randomised placebo controlled trial
• Effect of a test-and-treat approach to vitamin D supplementation on risk of all cause acute respiratory tract infection and covid-19: phase 3 randomised controlled trial (CORONAVIT)

CRN responded to media reports that following the publication of the vitamin D studies.

“Two new studies from the British Medical Journal on vitamin D and COVID-19 should be read cautiously, despite some overly simplistic early media coverage,” said Luke Huber, ND, Vice President, Scientific & Regulatory Affairs, fort he Council for Responsible Nutrition (CRN). “Reporting on this research that suggests vitamin D levels are not relevant to COVID-19 outcomes ignores the large body of research on this connection and downplays critical limitations of these studies.

“An editorial in BMJ accompanying the studies highlights some of the limitations of each study and notes that they ‘aren’t the final word’ on vitamin D’s role in protecting against COVID-19. For example, the editorial points out that about 50 percent of participants in the control arm of the Jolliffe, et al. study were using vitamin D on their own.

“The editorial also notes that ‘…these new trials remain compatible with the two large meta-analyses suggesting that vitamin D supplementation may be beneficial for vitamin D deficient individuals.’ Indeed, meta-analyses of studies conducted since the beginning of COVID-19 largely demonstrate a positive role for higher vitamin D levels in reducing the incidence, severity, and mortality from the disease.

“Finally, the editorial makes clear, ‘For those with inadequate vitamin D levels (<50 nmol/L), supplementation with 1000-2000 IU/day could be a safe, simple, and affordable way to restore vitamin D levels, improve bone health, and take advantage of any possible protective effect against respiratory tract infections.’”

CRN Suggests Strategies for Maintaining Wellbeing

“To prevent COVID-19, CRN encourages following proper public health measures including vaccination, testing, wearing a mask and maintaining social distance as appropriate, as well as optimizing vitamin D levels, which can be achieved through supplementation,” Dr. Huber said. “This isn’t an either/or situation, it’s a both/and—and those who suggest otherwise are doing the public a disservice. More than 100 clinical studies have been completed on vitamin D and COVID-19. This research is available at www.vitamindandme.org, along with interviews with experts and other resources exploring this issue.”

Related: Health Care Cost Savings from the Targeted Use of Dietary Supplements 2022–2030
CRN calls Vitamin D VITAL for Health Study a “Disservice to Americans Seeking Better Health