Published on February 7, 2022

A new randomized controlled clinical trial shows increased survival and quicker improvement for severe COVID-19 patients receiving nutrient support

Key Points

  • Researchers recognize that malnutrition and a deficiency of certain nutrients compromises immunity and the inflammatory response, leading to worse outcomes among COVID-19 patients
  • A randomized controlled clinical trial found that providing severe COVID-19 patients with nutritional support resulted in significantly increased survival rates; in fact, 7 times more patients died from COVID-19 without a nutritional support system compared to those who received nutritional support
  • The study also found that nutritional support resulted in decreased progression to mechanical ventilation, reduced intubation period, decreased need for supplemental oxygen, improved mood, and less occurrence of post-COVID syndrome

Adequate nutrition is essential to all aspects of health, with several nutrients specifically necessary to carrying out an effective immune response against an infection. In regards to COVID-19, research has shown that vitamin D, vitamin C, zinc, magnesium, and others can have a significant effect on immune health and disease outcomes. Nutrients used correctly and in the right doses are extremely safe and rarely have any side effects such as those seen with many pharmaceutical drugs. With this in mind, why isn’t nutritional support part of the standard treatment given for disease, especially for patients severely ill with COVID-19 who are fighting for their life?

Nutritional Support System (NSS) Implemented to Help Save the Lives of COVID-19 Patients

Leal-Martinez et al. recognized that malnutrition and a deficiency of certain nutrients compromises immunity and the inflammatory response, leading to worse outcomes among COVID-19 patients. In order to see if and how a nutritional support system (NSS) might reduce complications due to COVID-19 and improve survival, they designed a study that gave NSS to patients who had been hospitalized with stage III COVID-19 disease.

The study included patients who were ages 30 to 75 years old, whose oxygen saturation was below 90% at enrollment, and who presented with comorbidities (including diabetes, hypertension, and/or obesity). 40 patients were randomly assigned to a control group (receiving only the regular hospital diet and standard medical treatment), and 40 were assigned to the intervention group (receiving the hospital diet, standard medical treatment, and nutritional support).

What did the Nutritional Support System Consist of?

Those in the intervention group received the following:

  • B-complex: 10 mg of cyanocobalamin, 100 mg of thiamin, and 100 mg of pyridoxine administered intramuscularly every 24 h for the first 5 days
  • 2 envelopes of NSS powder each day (after morning and evening meals, diluted in 400 mL water) for 21 days. Daily intakes from these 2 packets resulted in Spirulina Maxima 5 g, folic acid 10 mg, glutamine 10 g, vegetable protein 20 g, constituted by two foods without processing or fragmenting in amino acids, brewer’s yeast, and amaranth, ascorbic acid 2 g, zinc 40 mg, selenium 200 mcg, cholecalciferol (vitamin D3) 4000 IU, resveratrol 400 mg, Omega-3 fatty acids 2 g, L-Arginine 1.5 g, inulin 40 g, and magnesium 800 mg.
  • Probiotics: Saccharomyces boulardii (SB) 500 mg daily for 6 days orally

Impressive (but not surprising) Results After 40 Days

Follow up for the patients was on day 40; at this time, there were 33 patients remaining in the control group (7 had died) and 39 remaining in the NSS group (1 had died). Nutritional support significantly increased survival and decreased mortality compared to the control group (p=0.027); in fact, 7 times more patients died without the nutritional support system than those who received nutritional support.

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  • The control group had a 82.5% survival rate and a 17.5% mortality rate, while the nutritional support group had a 97.5% survival rate and a 2.5% mortality rate – that is an 86% lower mortality among those receiving nutritional support
  • Nutritional support decreased progression to mechanical ventilation by 10%, reduced the intubation period by 15 days, and increased survival among those intubated by 38%, compared to the control group
  • Compared to the control group, the nutritional support group also saw a decreased need for supplemental oxygen and showed better oxygen saturation at follow up, as well as improved mood
  • Post-COVID syndrome was present in 37.5% of patients in the control group compared to 23.5% of patients from the nutritional support group

Don’t Wait for Severe COVID-19 – Improve Your Immune Health and Help Prevent COVID-19 NOW

Getting enough of certain nutrients is especially important, as both the innate and adaptive immune responses rely on these nutrients in order to function properly – of note, vitamins D, A, C and minerals such as magnesium, selenium and zinc. Unfortunately, there is an alarmingly high rate of insufficiency of these nutrients in the American population, making testing nutrient levels of great importance.

Through GrassrootsHealth, participants can measure levels of vitamin D, omega-3 fatty acids, and essential elements including magnesium, selenium and zinc, using an at-home blood spot test kit. Learn more about participating and order your custom test kit today!

Measure Your Nutrient Levels at Home

Having and maintaining healthy vitamin D levels and other nutrient levels can help improve your health now and for your future. Choose which to measure, such as your vitamin D, Omega-3 Index, omega fatty acid ratios, and essential minerals including magnesium and zinc, by creating your custom home test kit today. Take steps to improve the status of each of these measurements to benefit your overall health. You can also track your own intakes, symptoms and results to see what works best for YOU.

Enroll and test your levels today, learn what steps to take to improve your status of vitamin D (see below) and other nutrients and blood markers, and take action! By enrolling in the GrassrootsHealth projects, you are not only contributing valuable information to everyone, you are also gaining knowledge about how you could improve your own health through measuring and tracking your nutrient status, and educating yourself on how to improve it.

What Does it Take YOU to Get Your D to 40 ng/ml (100 nmol/L)?

Did you know your health could be greatly affected by making sure you have a vitamin D level of at least 40 ng/ml (100 nmol/L)? Help us help you.

STEP 1 - Do you know what your vitamin D level is? If not, be sure to test today to find out.

STEP 2 – Determine your target level. Are you at your target level? Experts recommend a level of at least 40-60 ng/ml (100-150 nmol/L).

STEP 3 – Need to boost your level? Use the D*calculator to see how much vitamin D it may take to reach your target. Opt for the Loading Dose for a quicker boost.

STEP 4 – Optimize how your body absorbs and utilizes vitamin D with co-nutrients and these simple steps.

STEP 5 – Re-Test! This is an important step to make sure you have reached your target level, and to ensure you are not taking too much! Re-testing after 3-4 months is recommended.

STEP 6 – Adjust, Repeat…

Give your immune system the nutrients it needs to support a healthy you and protect yourself from unnecessary diseases, especially COVID-19.


The first Randomized Controlled Trial on vitamin D and COVID-19 has shown a 96% lower risk of ICU admission for those receiving vitamin D (as 25(OH)D to quickly boost vitamin D blood levels) along with the standard treatment, compared to those receiving standard treatment alone.

These results support many previous observational studies showing a relationship between vitamin D levels and intake and COVID-19 severity.

Review the Latest Nutrient Research for COVID-19

GrassrootsHealth Nutrient Research Institute has launched the new Immune Boost project with the use of our myData-myAnswers nutrient health system that nearly 15,000 people are already using for their health. Specific markers that influence immune health are suggested for testing as part of this project including:

  • Vitamin D
  • Omega-3 Index
  • Essential elements magnesium, selenium, and zinc
  • hsCRP

Our goal is to demonstrate how one can use the Nutrient Research Model established by Dr. Robert Heaney to show the effect of vitamin D serum levels of at least 40 ng/ml (100 nmol/L) on risk reduction for all ethnicities in the population. Status and intake of other nutrients will also be analyzed for any type of relationship to immune status and symptom severity. Join the project today!

Please let us know if you're interested in helping sponsor this project.

CLICK HERE for updates and new information about the project.

Through GrassrootsHealth Nutrient Research Institute, you can also test your essential elements magnesium, copper, zinc and selenium, toxins such as lead, mercury and cadmium, as well as your omega-3 levels, inflammation levels and thyroid stimulating hormone (TSH) level. Find out your levels today! Log on to the test selection page (click the link below) to get your tests and see for yourself if your levels can be improved.

Make sure you track your results before and after, about every 6 months!

Click Here to Access the Test Page

How can I track my nutrient intake and levels over time?

To help you track your supplement use and nutrient levels, GrassrootsHealth has created the Personal Health Nutrient Decision System called

For each specific supplement, you can track what days you take it, how much, and many other details.  This will help you know your true supplemental intake and what patterns of use work for you to reach and maintain optimum nutrient levels. Check it out today!