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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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Remote Cardiac Monitoring India: Transforming Heart Health Through Continuous Digital Tracking

Heart disease remains one of the leading causes of death in India. According to the Indian Council of Medical Research (ICMR), cardiovascular diseases account for nearly 28% of total deaths in the country. With rising stress levels, sedentary lifestyles, air pollution exposure, diabetes, hypertension, and delayed diagnosis, the need for better cardiac monitoring has grown significantly. Remote cardiac monitoring India is emerging as a powerful solution to monitor heart health in real time and detect abnormalities before they turn into emergencies.

Remote cardiac monitoring involves wearable or portable ECG devices that track heart signals continuously or at regular intervals. These devices transmit data securely to cardiologists or AI-based systems, enabling early detection of arrhythmias, rhythm abnormalities, ischemic patterns, and fluctuations in heart rate variability (HRV). SecondMedic brings cutting-edge remote monitoring options that help patients manage heart-related risks effectively, anytime and anywhere.

Why Remote Cardiac Monitoring Is Becoming Essential in India

India has a disproportionately high cardiac burden. Reports by WHO show that Indians suffer heart attacks at a younger age compared to global averages. Additionally, more than 50% of cardiac patients in India do not recognize early warning signs and reach hospitals late.

Remote cardiac monitoring helps solve these challenges by offering:

Early arrhythmia detection
Timely identification of heart stress
Post-surgery cardiac recovery supervision
Reduced hospital dependency
Continuous heart rhythm tracking
Better outcomes for chronic heart patients

With easy access to digital ECG devices, monitoring is no longer limited to hospitals.

How Remote Cardiac Monitoring Works

Remote cardiac monitoring uses smart ECG patches, chest straps, handheld ECG devices, and even AI-driven wearables. These devices record heart electrical activity or rhythm patterns and transmit the data to:

Cardiologists
Digital dashboards
AI algorithms
Care teams

The real-time nature of the data allows immediate response in case of abnormalities.

Core parameters captured include:

ECG waveform
Heart rate variability (HRV)
Arrhythmias (AFib, SVT, PVCs)
Tachycardia or bradycardia
QT interval abnormalities
Stress-related heart rhythm changes

SecondMedic ensures that the captured data is clinically relevant and accessible to both patients and doctors.

Patients Who Benefit Most from Remote Cardiac Monitoring

1. Post-Cardiac Surgery Patients

After angioplasty, bypass surgery, pacemaker implantation, or stent placement, patients require strict monitoring for weeks or months. Remote devices track recovery trends.

2. Individuals With Arrhythmia

Conditions like atrial fibrillation (AFib) require continuous monitoring, as episodes may come and go unpredictably.

3. Patients With Heart Failure

Monitoring helps evaluate worsening symptoms or cardiac stress.

4. High-Risk Individuals

Patients with diabetes, hypertension, obesity, or family history of heart disease benefit from early detection.

5. Elderly and Homebound Patients

Remote monitoring eliminates frequent hospital visits for routine ECG checks.

6. People Experiencing Palpitations

Intermittent symptoms can be captured and analyzed with wearable monitors.

Key Advantages of Remote Cardiac Monitoring

Early Detection Saves Lives

Abnormal rhythms such as atrial fibrillation can go unnoticed and lead to stroke. Remote monitoring detects these in real time.

Avoids Emergency Situations

AI alerts allow doctors to intervene early before symptoms worsen.

Better Long-Term Cardiac Care

Continuous data provides better insights than occasional clinic-based ECGs.

High Accuracy

Medical-grade ECG wearables match hospital-level precision for diagnosis.

Patient Convenience

Patients can monitor their heart health from home, office, or while traveling.

Improved Doctor Decisions

Trend-based cardiac data supports more accurate treatment planning.

Role of AI in Remote Cardiac Monitoring

AI and machine learning models analyze patterns collected from ECG devices.

AI enhances care by:

Identifying subtle abnormalities
Predicting arrhythmia events
Detecting ischemic trends early
Classifying ECG signal types
Reducing manual interpretation burden

SecondMedic integrates AI-assisted analysis to strengthen cardiac risk evaluation.

Post-Surgery and Rehabilitation Monitoring

Cardiac rehabilitation is crucial after major procedures. Remote monitoring provides:

Heart rate control
Blood pressure trend tracking
Rhythm abnormality detection
Activity monitoring
Medication adherence support

This reduces readmission rates and supports safer recovery.

Remote Cardiac Monitoring in Rural India

Many small towns lack cardiology specialists or advanced ECG equipment. Remote monitoring bridges this gap by:

Connecting patients to cardiologists virtually
Providing ECG analysis without hospital visits
Reducing delay in diagnosis
Supporting long-term monitoring at home

SecondMedic helps democratize heart care access across India.

Challenges and Solutions

Device Accuracy Variability

Solution: Use medical-grade, certified ECG wearables.

Digital Literacy Issues

Solution: Simple interfaces, guided onboarding, multilingual instructions.

Data Security

Solution: End-to-end encrypted data under DPDP Act compliance.

Connectivity Challenges

Solution: Devices with offline sync capabilities.

Future of Remote Cardiac Monitoring in India

The next decade will bring significant advancements:

Patch-based continuous ECG devices
AI-driven early warning scores
Smart pacemaker data integration
Multi-day continuous ECG monitoring
Predictive arrhythmia detection algorithms
Tele-ICU support for remote patients

SecondMedic is actively working to integrate next-generation cardiac monitoring tools into its platform.

Conclusion

Remote cardiac monitoring India is transforming heart care by enabling real-time ECG tracking, early abnormality detection, and continuous cardiologist oversight. This digital-first approach empowers high-risk patients, improves outcomes, and ensures safer long-term cardiac management. SecondMedic’s integrated digital heart monitoring solutions allow patients across India to access expert cardiac care anytime.

To explore remote cardiac monitoring solutions, visit www.secondmedic.com

References

ICMR - Cardiovascular disease burden
WHO - Early cardiac risk detection
NITI Aayog - Digital health innovation in India
ABDM - Unified digital health mission
Statista - Wearable and ECG device adoption India
SecondMedic cardiac care insights

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