News Release 

Clinical trial to investigate whether vitamin D protects against COVID-19

Researchers from Queen Mary University of London, funded by Barts Charity, have launched a new clinical trial to investigate whether taking vitamin D could protect people from COVID-19.

Queen Mary University of London

Science Business Announcement

CORONAVIT will run for six months and involve more than 5,000 people to find out whether a 'test-and-treat' approach to correct people's vitamin D deficiency during winter will reduce the risk and/or severity of COVID-19 and other acute respiratory infections.

People will take part in the study from their homes, without any face-to-face visits needed, as all vitamin D tests and supplements will be sent via the post. Any UK resident aged 16 or more can participate if they are not already taking high-dose vitamin D. To register interest, people can contact the study team on coronavit@qmul.ac.uk.

Strategies to boost the UK population's immunity to respiratory infections are urgently needed pending development of an effective vaccine for coronavirus. There have been recent debates as to whether vitamin D - the 'sunshine vitamin' - could play a key role in protecting people from COVID-19; however, definite evidence on this is lacking.

Lead researcher Professor Adrian Martineau from Queen Mary University of London said: "There is mounting evidence that vitamin D might reduce the risk of respiratory infections, with some recent studies suggesting that people with lower vitamin D levels may be more susceptible to coronavirus.

"Many people in the UK have low vitamin D levels, particularly in the winter and spring, when respiratory infections are most common. Vitamin D deficiency is more common in older people, in people who are overweight, and in Black and Asian people - all of the groups who are at increased risk of becoming very ill with COVID-19.

"The UK government already recommends that people take a low-dose vitamin D supplement over the winter to protect their bone health, but we do not know if this will have effect on COVID-19 or if higher doses might be able to provide protection against the virus. The CORONAVIT trial will test whether higher doses of vitamin D might offer protection against winter respiratory infections including COVID-19."

UK sunshine is too weak to make vitamin D in the skin between October and April, and dietary sources of vitamin D are limited: consequently, around 2 in 5 of the UK adult population have inadequate levels of vitamin D over winter and spring. The UK government recommends that the general population considers taking vitamin D supplements at a dose of 400 International Units (IU) or 10 micrograms per day during winter and spring. This has recently been extended to a recommendation of year-round supplementation in view of potentially decreased sun exposure during 'lockdown'.

However, early unpublished data from the Queen Mary team shows that 2 in 3 people are not following this advice, potentially due to a reluctance to buy and take a supplement without a test result that shows they are vitamin D deficient.

The intervention to be evaluated involves doing a postal finger prick vitamin D test, which will be processed in an NHS lab. Participants who are found to have low levels of vitamin D in their blood will then be given a six months' supply of either 800 or 3,200 IU of vitamin D a day.

The research team will then track the incidence of doctor-diagnosed or laboratory-confirmed acute respiratory infection in the participants, including COVID-19, to see whether vitamin D supplementation has had an effect on their risk and severity of infection.

Principal Investigator of the study, Dr David Jolliffe from Queen Mary University of London, added: "CORONAVIT trial has the potential to give a definitive answer to the question of whether vitamin D offers protection against COVID-19. Vitamin D supplements are low in cost, low in risk and widely accessible; if proven effective, they could significantly aid in our global fight against the virus."

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For more information, please contact:

Joel Winston
Communications Manager (School of Medicine and Dentistry)
Queen Mary University of London
j.winston@qmul.ac.uk
Tel: +44 (0)7968 267 064

Notes to the editor

About Queen Mary University of London

At Queen Mary University of London, we believe that a diversity of ideas helps us achieve the previously unthinkable.

In 1785, Sir William Blizard established England's first medical school, The London Hospital Medical College, to improve the health of east London's inhabitants. Together with St Bartholomew's Medical College, founded by John Abernethy in 1843 to help those living in the City of London, these two historic institutions are the bedrock of Barts and The London School of Medicine and Dentistry.

Today, Barts and The London continues to uphold this commitment to pioneering medical education and research. Being firmly embedded within our east London community, and with an approach that is driven by the specific health needs of our diverse population, is what makes Barts and The London truly distinctive.

Our local community offer to us a window to the world, ensuring that our ground-breaking research in cancer, cardiovascular and inflammatory diseases, and population health not only dramatically improves the outcomes for patients in London, but also has a far-reaching global impact.

This is just one of the many ways in which Queen Mary is continuing to push the boundaries of teaching, research and clinical practice, and helping us to achieve the previously unthinkable.

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