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Published on: Apr 17, 2020
4 minute read
By: Dr Rajan Choudhary

Vitamin D In Reducing The Risk Of COVID 19

Why Vitamin D is the only supplement we will recommend for you.

Most of our blogs have looked at theories posted on social media, and shown how they are usually not true, or have no factual basis behind them. But here we will show some evidence that supports something truly interesting, especially during the time of this pandemic.

For a number of years research has shown a possible link between vitamin D and illnesses, specifically respiratory infections. In our previous blogs we have shown that vitamin supplementation is unnecessary, except for vitamin D. Here we will show why supplementation may be in your best interest for reducing the risk of COVID.

Now I’ll be honest. Vitamin D and immunity was not something we were taught at medical school, or in medical practice. The fact that such a large amount of research exists on this topic is certainly interesting, and whilst researching this topic I have certainly learnt a lot myself, enough to change my own medical practice. And it is because of the high quality of evidence present that I feel confident in supporting the claims below.

SUMMARY

Many people are low in Vitamin D due to various risk factors (see our blog on vitamin D)
Vitamin D appears to have a role in modulating immune function
Low Vitamin D levels appear to increase the severity of autoimmune disorders
Low Vitamin D levels appear to increase the risk of getting respiratory infections
Vitamin D supplementation appears to reduce the risk of getting respiratory infections
Those who are at risk of having low vitamin D should take low dose supplementations.

If you want the good stuff, skip to the section on SUPPLEMENTATION

IMMUNE FUNCTIONS

As we’ve discussed, vitamin D is key in maintaining the right balance of calcium, ensuring the right amount is taken up from the food we eat, integrated into our bones, and removed in our urine if not required. We know that there are some people who are at risk of vitamin D deficiency, and this is more common in countries closer to the poles and with cloudy weather.

But there also appears to be a role for vitamin D in modulating the immune system. We have found many more cells in our body other than bone, intestine and kidney that possess the vitamin D receptor. These include immune cells, and one role may be to promote proliferation of these cells as well as promote their protective immunity.

AUTOIMMUNE

Due to its role in immune function, studies have been performed to see whether there is a link between autoimmune diseases and vitamin D. Common autoimmune disorders (and the organs the affect) include multiple sclerosis (nerves), rheumatoid arthritis (joints), diabetes mellitus (pancreas), inflammatory bowel disease (bowels) and systemic lupus erythematous (the entire body). All of these diseases lead to loss in function of an organ or system as the immune system recognises the organ as an “invader” and begins to destroy it.

One study looked at 161 patients with early forms of autoimmune diseases over 2 years. Out of them, 35 went on to develop full blown autoimmune disorders (like rheumatoid and lupus). Whilst the two groups of patients were mostly similar, vitamin D was noticeably lower in the group that progressed to disease. But this is one study, with a small number of patients.

Other studies have looked at vitamin D levels in patients across the globe, and the majority of them have shown there to be a correlation between low vitamin D or severe deficiency, and the severity of autoimmune disorder they have. We will not go into them in detail because this is beyond the scope of this blog, but it certainly is interesting and supports this new role for vitamin D.

RESPIRATORY INFECTIONS

We have unknowingly tried to use Vitamin D to treat infections prior to the advent of antibiotics. A common treatment for tuberculosis was to send patients to sanatoriums, where treatments included exposure to sunlight, and provision of cod liver oil, a rich source of vitamin D.

Large population studies done in the 1980s and 1990s involving 19,000 people showed that those with low vitamin D levels were more likely to self report recent upper respiratory tract infections than those with normal levels. This was true even if age, gender, season and race were accounted for. Similar studies have shown similar results when looking at rates of influenza, bacterial vaginosis and HIV.

Normally we are very skeptical with such studies, and look for weaknesses in their methodology and conclusions. After all, we could just cherry pick the studies that show a benefit. Furthermore, just because there is a trend with vitamin D levels and infection, this does not imply a direct link. More evidence is required. However, the fact 19,000 people were surveyed provides this study with good statistical power, and lends it validity. But lets look for more.

SUPPLEMENTATION

Vitamin D supplementation to prevent acute respiratory tract infections: systematic review and meta-analysis of individual participant data – Martineau 2017, British Medical Journal

A systematic review and meta analysis is the highest level of evidence in the realm of medical research. It is the absolute pinnacle of thorough research, looking and comparing other studies with very close scrutiny to see whether we have conducted enough research worldwide to support a theory. In this case this systematic review was published in the British Medical Journal, a highly reputable source that again scrutinises any study submitted thoroughly before accepting it for publication. In my eyes, this is some of the best evidence we will have on this topic. And it is a far sight better than any WhatsApp forwards.

So what does this say?

Vitamin D supplementation was safe and it protected against acute respiratory tract infection overall. Patients who were very vitamin D deficient and those not receiving bolus doses experienced the most benefit.

I don’t think I could have summarised it better myself. If you wish to read the study yourself you can use this link: https://www.bmj.com/content/356/bmj.i6583 Vitamin D supplementation to prevent acute respiratory tract infections

WHAT DOES THIS MEAN FOR ME?

If you are someone who may be at risk of vitamin D deficiency, then low dose supplements (NOT treatment dose) may be beneficial in reducing the risk of getting a respiratory infection. Since COVID is caused by a respiratory virus, we can extrapolate that Vitamin D supplementations may reduce your risk of getting COVID. This is not a cure, and it is not a guaranteed protection. If you already have a balanced diet and are not low in Vit D, it may be less beneficial.

Dr Rajan Choudhary, UK, Chief Product Officer, Second Medic Inc

www.secondmedic.com

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How Weekly Onsite Yoga Benefits Corporate Wellness: A Preventive Approach to Workplace Health

Corporate wellness programs are evolving rapidly. Traditional initiatives such as annual health checkups and gym memberships are no longer sufficient to address modern workplace health challenges. Rising stress levels, sedentary routines and burnout have pushed organisations to adopt preventive, sustainable wellness strategies. One of the most effective among these is weekly onsite yoga.

Understanding how onsite yoga weekly benefits corporate wellness highlights why this ancient practice has become a modern workplace necessity. Yoga addresses both physical and mental health, making it uniquely suited for today’s high-pressure corporate environments.

Why Corporate Wellness Needs Preventive Solutions

According to the Indian Council of Medical Research (ICMR) and workplace health reports, lifestyle-related disorders such as hypertension, diabetes, obesity and mental health conditions are increasingly affecting working professionals.

Key workplace health challenges include:

prolonged sitting
poor posture
chronic stress
sleep disturbances
reduced physical activity

Preventive interventions are essential to reverse these trends before they result in chronic disease and productivity loss.

What Is Weekly Onsite Yoga?

Weekly onsite yoga involves structured yoga sessions conducted at the workplace by trained instructors. These sessions typically include:

stretching and mobility exercises
breathing techniques
simple yoga postures
relaxation and mindfulness practices

Sessions are designed to be inclusive, requiring no prior yoga experience.

Why Weekly Frequency Matters

Consistency is the foundation of wellness.

Weekly yoga sessions:

reinforce healthy habits
prevent accumulation of stress
support gradual physical improvement
encourage long-term participation

Unlike one-time workshops, weekly programs deliver sustained impact.

Physical Health Benefits of Onsite Yoga

Reduces Musculoskeletal Problems

Desk-based work often leads to back pain, neck stiffness and joint discomfort. Yoga improves:

posture
flexibility
muscle strength

This reduces work-related musculoskeletal disorders.

Improves Cardiovascular and Metabolic Health

Regular yoga practice supports:

blood pressure regulation
improved circulation
better glucose control

WHO recognises yoga and similar mind-body practices as beneficial for lifestyle disease prevention.

Enhances Energy Levels

Yoga improves oxygenation and circulation, reducing fatigue and mid-day energy crashes.

Mental Health Benefits in the Workplace

Reduces Stress and Burnout

Yoga lowers cortisol levels and activates the parasympathetic nervous system, promoting relaxation.

This helps employees:

manage deadlines calmly
recover from mental fatigue
reduce anxiety

Improves Focus and Cognitive Performance

Breathing and mindfulness practices improve:

attention span
mental clarity
decision-making

Better focus directly translates into improved productivity.

Supports Emotional Wellbeing

Regular yoga enhances emotional regulation, reducing irritability and improving workplace relationships.

Impact on Productivity and Performance

Healthy employees perform better.

Weekly onsite yoga contributes to:

reduced absenteeism
fewer stress-related sick days
improved work engagement
sustained productivity

EY-FICCI corporate wellness studies show that preventive wellness programs deliver measurable performance benefits.

Role in Building a Wellness-Oriented Culture

Onsite yoga sends a strong message that employee wellbeing is a priority.

It helps organisations:

foster trust and engagement
encourage work-life balance
create a supportive environment

Wellness culture improves retention and employer branding.

Inclusivity and Accessibility

One of yoga’s biggest strengths is adaptability.

Onsite yoga:

suits all age groups
accommodates different fitness levels
requires minimal equipment
can be modified for health conditions

This inclusivity ensures broad participation.

Cost-Effectiveness and ROI

Compared to advanced medical interventions, onsite yoga is:

low-cost
scalable
preventive rather than reactive

By reducing long-term healthcare costs, yoga delivers high return on investment for employers.

Yoga as Part of Preventive Healthcare

Preventive healthcare focuses on reducing risk factors before disease develops.

Weekly onsite yoga supports prevention by:

lowering stress-related disease risk
improving metabolic health
encouraging active lifestyles
supporting mental resilience

NITI Aayog recognises workplace wellness as a key lever for national health improvement.

Integration with Corporate Wellness Programs

Onsite yoga works best when integrated with:

preventive health checkups
stress management initiatives
nutrition education
digital health tracking

Integrated programs deliver stronger outcomes than isolated activities.

Overcoming Common Barriers

Some organisations hesitate due to:

time constraints
perceived lack of interest
space concerns

However, short, well-structured sessions (30–45 minutes) overcome these challenges effectively.

Long-Term Impact on Organisations

Organisations that adopt weekly onsite yoga observe:

healthier workforce
reduced burnout
improved morale
better long-term healthcare outcomes

Lancet workplace health studies show that consistent mind-body interventions yield benefits within 6–12 months.

Conclusion

Understanding how onsite yoga weekly benefits corporate wellness reveals why it is more than a fitness activity—it is a preventive health strategy. By addressing physical strain, mental stress and lifestyle risks, weekly onsite yoga supports healthier employees, stronger productivity and sustainable wellness culture. In today’s demanding corporate environment, investing in regular yoga sessions is an investment in long-term organisational resilience and success.

References

ICMR – Workplace Health and Lifestyle Disease Reports
National Family Health Survey (NFHS-5) – Adult Health and Stress Indicators
NITI Aayog – Preventive Healthcare and Workplace Wellness Strategy
WHO – Physical Activity, Yoga and Mental Health Guideline
Lancet – Mind-Body Interventions and Workplace Health Outcomes
EY-FICCI – Corporate Wellness and Productivity Report
Statista – Corporate Wellness Program Trends India

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