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Can nutritional supplements strengthen the immune system?

In the face of the current crisis of the pandemic created by the Coronavirus COVID-19, it is well known that there is no way to prevent the disease other than to avoid contagion with social isolation.


We don't have a vaccine.


When we get sick, we don't have a specific medicine to cure us.


What do we have left?


My opinion: strengthen our immune system.


The immune system consists of a complex collection of cells and biochemical processes that are constantly on the defense against invading agents: viruses, bacteria, fungi, and toxins.


Acquiring a healthy lifestyle is very important to maintain a robust immune system and be able to prevent infections and diseases. Strengthening is possible when we eat nutrient-laden foods, exercise, and use nutritional supplements.


The function of nutritional supplements is to cover nutrient deficiencies. We have deficiencies because we do not manage to ingest all the necessary nutrients with the feeds, which is why a booster is necessary. Since not all of us eat balanced or highly nutritious meals either because there are foods we do not like or because they are not available or because of the way they cook or because the food arrives old from the market and therefore malnourished.


Our body, during digestion, seeks to absorb essential nutrients such as vitamins, minerals, proteins, carbohydrates, fats, and water. These nutrients are essential for life's basic processes, such as converting food into energy, promoting growth, repairing tissues, increasing defenses, and preventing diseases. Among the nutritional supplements that can help us boost the immune system is vitamin D.

Vitamin D

Vitamin D is a fat-soluble nutrient and is essential for good health and the proper functioning of the immune system. Vitamin D helps white cells (monocytes and macrophages) fight and decrease inflammation. 


Many people are deficient in vitamin D, which affects the functioning of the immune system. Low vitamin D levels are considered to increase the risk of developing respiratory tract infections, influenza, asthma, and allergies. (a)


The use of vitamin D in supplement form has been proven in studies to affect the immune system positively and that it is important to protect the respiratory system from infections. (b)




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