Vitamin D, Magnesium and Vitamin B12 (DMB): Allies against COVID-19

Updated: Apr 16

Recent research from multiple scientific sources reveals that Vitamin D, magnesium and Vitamin B12 (referred to as "DMB") may play a role against contracting COVID-19. It is vital that you maintain your levels of all three elements through your diet and by using health supplements.

Ensure you get enough Vitamin D, Magnesium and Vitamin B12 to strengthen yourself against COVID 19

Your body produces Vitamin D from sunlight. This winter, try to walk outdoors when the sun is shining. A 30-minute walk will improve your Vitamin D absorption and improve your mood and health.

The Research

A recent letter published by Dr. Grigorios Panagiotou, Sun Ann Tee and others in Clinical Endocrinology reported that the majority of patients with COVID-19 admitted to Newcastle-upon-Tyne Hospital reported a vitamin D deficiency. This letter also makes the link between male patients and propensity for obesity, diabetes, hypertension and other factors that may strengthen susceptibility to COVID-19

"The global pandemic of coronavirus disease 2019 (COVID‐19) caused by severe acute respiratory syndrome coronavirus‐2 (SARS‐CoV‐2) is associated with higher fatality in respect of male sex, ageing, obesity, diabetes, hypertension, climatic factors (low ambient temperature and high geographic latitude) and, in the UK and North America, with darker‐skinned ethnicities; in all of which circumstances, vitamin D deficiency (VDD) is more common.


The majority of COVID‐19 inpatients (ie 90/134 patients or 66.4%) had vitamin D insufficiency (25‐50 nmol/L); 50/134 (37.3%) were deficient (<25 nmol/L), and 29/134 (21.6%) had severe deficiency (≤15 nmol/L)."

In April 2020, similar research was published in Nutrients Magazine by William Grant and co-authors, who found that:

Evidence supporting the role of vitamin D in reducing risk of COVID-19 includes that the outbreak occurred in winter, a time when 25-hydroxyvitamin D (25(OH)D) concentrations are lowest; that the number of cases in the Southern Hemisphere near the end of summer are low; that vitamin D deficiency has been found to contribute to acute respiratory distress syndrome; and that case-fatality rates increase with age and with chronic disease comorbidity, both of which are associated with lower 25(OH)D concentration.


To reduce the risk of infection, it is recommended that people at risk of influenza and/or COVID-19 consider taking 10,000 IU/d of vitamin D3for a few weeks to rapidly raise 25(OH)D concentrations, followed by 5000 IU/d. The goal should be to raise 25(OH)D concentrations above 40–60 ng/mL (100–150 nmol/L). For treatment of people who become infected with COVID-19, higher vitamin D3 doses might be useful.

Dr. Mercola reports that by taking magnesium and Vitamin K in addition to Vitamin D, your body will be able to synthesize Vitamin D more effectively and require lower levels of Vitamine D for effective absorption by the body. Magnesium deficiency has also been linked to diabetes and high blood pressure, both of which indicated greater susceptibility to COVID-19. Mercola reports on a study of 43 COVID-19 patients at Singapore General Hospital:

The cohort study involved 43 COVID-19 patents who were admitted to the Singapore General Hospital between January 15, 2020, and April 15, 2020. Seventeen of the patients received oral vitamin D3 (1,000 IU), magnesium (150 milligrams (mg)) and vitamin B12 (500 mcg) — together known as DMB — upon admission for a median of five days while 26 patients who did not receive DMB served as the control group.

Significant benefits were seen among the DMB group, with only 17.6% requiring initiation of oxygen therapy during their hospitalization, compared to 61.5% of those in the control group. The requirement for oxygen is associated with an increased risk of needing intensive care, and the DMB group also benefited in this area.

Several other studies have found a similar link: please view the sources at the end of this article.

Get enough DMB!

Vitamin D is produced naturally by your body when exposed to sunlight. As autumn and winter approach, it is vital that you maintain your vitamin D levels. You can do this by:

  1. Walking outdoors in sunlight for at least 30 minutes each day;

  2. Eating foods rich in vitamin D, such as salmon, herring, sardines, tuna and eggs;

  3. Eating fortified foods such as orange juice, milk, cereals and oatmeals.

According to Healthline, the recommended daily value (DV) is 800 IU (20 mcg) of vitamin D per day from foods. If you are not able to get enough sunlight on a regular basis, your intake should likely be closer to 1,000 IU (25 mcg) per day.

Salmon is an excellent source of Vitamin D, Magnesium and Vitamin B12. Be careful about using salmon farmed from aquaculture: prioritise line-caught, sustainable salmon where possible.

Vitamin B12 can be found in meats and fish, notably clams, liver, trout, salmon, tuna, beef, ham, egg and chicken. It is also found in Greek yoghurt and fortified breakfast cereal. Harvard Medical School has published a list of recommended sources and volumes here.

Magnesium is more widely available. The Cleveland Clinic recommends men absorb 400-420 mg per day and women 310-320 mg per day. Sources of magnesium include almonds, spinach, cashews, peanuts, cereal, soy milk, black beans, dark chocolate, edamame, bread, avocado, broccoli, apple, carrot, potato, rice, yoghurt, oatmeal, banana, salmon, halibut, milk, beef, and chicken.

Food Supplements

We recommend three top-quality food supplements to reinforce your health this winter:

Mag6 provides you with 48 mg of magnesium and 5 mg of B6. Magnesium helps to support and regulate many cellular processes, while Vitamin B6 serves as a coenzyme for a number of essential biochemical reactions in the body. LEARN MORE

DIAS Beauty Collagen contains collagen Type I, II and III; Vitamin C, Vitamin D, Zinc, Selenium and Biotin. In addition to supporting the immune system, DIAS contrinued to a health hair, skin, and nails, which are often affected by cold weather. LEARN MORE

Evelor is a trans-resveratrol, a powerful antioxidant and a member of a group of plant compounds called polyphenols. It is found in red grapes, berries and in large quantities in the Japanese and Chinese knotweed plant Polygonum cuspidatum. Evelor helps maintain a healthy cardiovascular system, supports a strong immune system and protects the liver. LEARN MORE

As always, if you have any questions, please contact us!


7 Healthy Foods That Are High in Vitamin D

Healthline: 18 December 2019

Evidence that Vitamin D Supplementation Could Reduce Risk of Influenza and COVID-19 Infections and Deaths

Nutrients: 2 April 2020

Low serum 25‐hydroxyvitamin D (25[OH]D) levels in patients hospitalized with COVID‐19 are associated with greater disease severity

Clinical Endocrinology: 3 July 2020

Magnesium-Rich Food

Cleveland Clinic: 12 January 2014

The A List of Vitamin B12 Foods

Harvard Health Publishing: December 2016

Vit D, Magnesium and B12 Significantly Improve COVID Outcomes

Mercola: 11 August 2020

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