How does vitamin D supplementation affect COVID-19 vaccine efficacy?
  • Reading time:5 min(s) read

In a latest research posted to the medRxiv* preprint server, researchers assessed the affect of vitamin D supplementation on the efficacy of extreme acute respiratory syndrome coronavirus 2 (SARS-CoV-2) vaccines.

Study: Influence of vitamin D supplementation on SARS-CoV-2 vaccine efficacy and immunogenicity. Image Credit: Fast Speeds Imagery/Shutterstock

Coronavirus illness 2019 (COVID-19) vaccination has performed a essential function in controlling the COVID-19 pandemic. However, research have reported the waning of vaccine effectiveness and efficacy within the months after vaccination, significantly amongst aged people. Hence, there’s an pressing have to determine immunomodulatory adjuvants that may enhance SARS-CoV-2 vaccine immunogenicity.    

About the research

In the current research, researchers explored three sub-studies that investigated the affect of vitamin D alternative on the efficacy of SARS-CoV-2 vaccines.

The group carried out three sub-studies performed inside the CORONAVIT randomized managed trial. Among these, sub-study 1 carried out vaccine efficacy evaluation to evaluate the impact of vitamin D supplementation on the chance of breakthrough COVID-19 an infection amongst immunocompetent individuals vaccinated with two SARS-CoV-2 vaccine doses. Sub-study 2 carried out a dried blood spot evaluation that assessed the affect of supplementing vitamin D on mixed immunoglobulin G (IgG), IgA, and IgM (IgGAM) antibody responses to the SARS-CoV-2 spike (S) protein. Furthermore, sub-study 3 performed a venous blood evaluation that exposed the affect of vitamin D dietary supplements on mobile responses and neutralizing antibodies. 

The research concerned 6200 people residing within the UK who have been aged 16 years and above who have been randomized to be handled with a postal vitamin D take a look at, which was adopted by a decrease dose or increased dose supplementation. All the individuals who have been vaccinated with a minimal of two SARS-CoV-2 vaccine doses supplied a postal dried blood spot pattern which was used to evaluate the mixed IgGAM antibody responses to the SARS-CoV-2 S protein. Moreover, 101 individuals additionally supplied venous blood samples to evaluate the mobile responses and ranges of neutralizing antibodies to SARS-CoV-2.

The inclusion standards for the vaccine efficacy evaluation have been participation within the CORONAVIT trial and vaccination with a minimal of two SARS-CoV-2 vaccine doses. On the opposite hand, the individuals eligible for dried blood spot evaluation have been included in sub-study 1, had consented to take part within the serology research carried out after vaccination, and had anti-S titer outcomes accessible after the second vaccination and earlier than the booster dose administration. The venous blood evaluation included individuals eligible for sub-study 1, consented to post-vaccination participation and supplied legitimate neutralizing antibody and mobile response information.       

The eligible individuals have been subsequently randomized earlier than figuring out the concentrations of 25(OH)D of their capillary blood. Participants who had a 25(OH)D focus of lower than 75 nmol/L got a six-month provide of capsules comprising both 800 IU or 3200 IU vitamin D3. In comparability, these having 25(OH)D concentrations of 75 nmol/L or above have been handled with a second postal vitamin D take a look at two months after the primary take a look at.

The main final result of sub-study 1 was breakthrough COVID-19 an infection which was adopted up two weeks after the administration of the second vaccine dose for as much as six months thereafter or till the analysis of a breakthrough an infection, whichever was earlier. The group obtained particulars associated to vaccination and breakthrough an infection by on-line questionnaires answered by the individuals at month-to-month intervals.             


The research outcomes confirmed that among the many 6200 CORONAVIT trial individuals, 45.3% have been immunized with the first SARS-CoV-2 vaccination program, together with 69.3% who have been vaccinated with two doses of ChAdOx1 vaccine, whereas 30.7% have been vaccinated with two BNT162b2 vaccine doses.

For the individuals whose baseline vitamin D concentrations have been assessed, the typical 25(OH)D stage was 39.9 nmol/L. On the opposite hand, individuals that have been assessed for end-study vitamin D concentrations confirmed that the follow-up 25(OH)D concentrations have been increased among the many individuals who have been handled with lower-dose dietary supplements as in comparison with the untreated individuals. Furthermore, follow-up 25(OH)D concentrations have been increased among the many participant cohort that was handled with increased dose dietary supplements as in comparison with the untreated cohort.    

Breakthrough COVID-19 infections have been noticed in 174 individuals from sub-study 1. The group additionally noticed no variations between the vitamin D-supplemented and non-supplemented cohorts regarding mixed anti-S IgGAM in common post-vaccination titers. Furthermore, the individuals who supplied blood samples confirmed no substantial variations between the handled and untreated individuals with respect to common neutralizing antibodies titers.        

Overall, the research findings confirmed that every day supplementation with 800 IU or 3200 IU vitamin D3 successfully elevated the concentrations of circulating 25(OH)D. However, neither of the doses impacted the efficacy of the SARS-CoV-2 vaccines.

*Important discover

medRxiv publishes preliminary scientific stories that aren’t peer-reviewed and, due to this fact, shouldn’t be considered conclusive, information scientific follow/health-related conduct, or handled as established info.

Journal reference:

  • David A Jolliffe, Giulia Vivaldi, Emma S Chambers, Weigang Cai, Wenhao Li, Sian E Faustini, Joseph M Gibbons, Corinna Pade, Alex Richter, Aine McKnight, Adrian R Martineau. (2022). Influence of vitamin D supplementation on SARS-CoV-2 vaccine efficacy and immunogenicity. medRxiv. doi: material/10.1101/2022.07.15.22277678v2

If you are interested in working in a distraction free environment, visit our site Blissful Noises where we provide various sounds and features to help you focus or relax.