What is the Immune system? And what is its function in the body?


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PS Please note: I am not a medical practitioner neither a dietician I write this article according to my experience with Vitamins and my knowledge on the use of herbs.

The Immune system is a complex combination of cells, processes, and chemicals that constantly defends the body against the invasion of pathogens which includes viruses, bacteria and toxins.

It is of paramount importance for individuals to keep the immune system healthy at all times to prevent infections and diseases. Ensure to your nutrition level is at the peak by consuming nutritious foods taking exercise and getting enough sleep.

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Like any other system in the body, the Immune system is boosted by the foods we ate. Research reveals that some vitamins, herbs, minerals, and other substances if consumed, will boost the immune system and potentially protect against illness.

Without having qualified proof about food supplements, I would not recommend a supplement for the cure of any virus infection, as it might counteract any medication you given by your medical practitioner. Note though, Vitamins, and Minerals are known to boost the immune system as well as ensuring wellbeing to the whole body.


Research has shown a number of herbs and or vegetables that contain many useful vitamins and Minerals that is in use for generations. And people have seen much health benefits using them. From a traditional health benefits point of view added by research. Many Supplements have entered the health foods markets and are doing well in sales and consumers testimonials.

Vitamins C

Among which is the well-known Vitamin C which many people takes daily in supplements and in the natural form of fruits herbs and vegetables. Vitamin C is one of the vitamins that protect against infections as it is one active ingredient in the health of the immune system.

Vitamin C enhances the function of some Immune cells and their ability to fight against infections. Vitamin C helps to keep the Immune system healthy by cleaning out dead cells and replenishes them with new cells. Because Vitamin C is an antioxidant, it also protects against damage by oxidative stress.

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This occurs with the accumulation of reactive molecules which is free radicals. Do keep in mind that oxidative stress does negatively affect Immune health which is connected to many diseases. Vitamin C based supplements are shown to reduce the severity of respiratory rack infections to include common cold.

Many studies of above twenty-eight in over eleven thousand three hundred people have also revealed that regularly consuming Vitamin C rich supplements reduced common occurrence in those under high physical stress such as those in the military and those running a marathon by a large percentage.

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Also, intravenous vitamin c treatment has shown to drastically improve symptoms in people with severe infections such as sepsis and acute respiratory distress syndrome which result from viral infections. There is no doubt that these results have clearly confirmed that vitamin supplements can significantly embrace Immune health.

Significantly in those who do not get enough of the vitamin in their diet. I conclude that vitamin C is good for Immune health. Consuming vitamin C supplement can reduce the duration and severity of respiratory tract infections which include common cold.

2) Vitamin D

Vitamin D which is a fat-soluble nutrient is essential to the healthy functioning of the Immune system. Vitamin D boos the pathogen-fighting qualities of monocytes and macrophages, these are white blood cells that are important parts of the Immune system defence Vitamin D decreases inflammation, and help promote Immune response.

Deficiency of this important Vitamin may negatively affect immune function. The truth be told, low Vitamin D levels are associated with an increased risk of upper respiratory tract infections, which include Influenza and allergic asthma.

There were control studies done in 2019 little under eleven thousand four hundred people who were supplementing with Vitamin D has significantly decreased the risk of respiratory infections. Some studies note that Vitamin D supplement may improve response to antiviral treatments in people with infections including hepatitis c and HIV

I conclude that Vitamin D is essential for immune function. A healthy intake of Vitamin D can help lower your risk of respiratory infections.

3) Elderberry

Black Elderberry has long been used to treat infections; it is being researched for its effects on the Immune System. Test-tube studies, elderberry extract has shown potent antibacterial and antiviral potential against bacterial pathogens that are responsible for upper respiratory tract infections and strains of the influenza virus.

Elderberry has been shown to enhance the Immune system response and may help to shorten the duration and severity of common colds, as well as reduce related symptom to viral infections. I conclude that taking Elderberry supplement may reduce upper respiratory symptoms caused by viral infections and help alleviate flu symptoms.

4) Zinc

Zinc is one mineral that is normally added to supplements and some other health care products such as lozenges that are meant to boost your Immune system. Zinc is a mineral that is essential for the Immune system function. Zinc is also needed for Immune cells development and communication it plays an important role in the inflammatory response.

Deficiency in this nutrient will drastically affect the Immune system’s ability to function effectively. Which will result in an increased risk of infection and disease, including pneumonia?

A significant amount of people about two billion globally are affected by Zinc deficiency which is more common in elderly people. About thirty per cent of the older adults are deficient in this nutrient.

Many studies have shown that zinc supplements protect against respiratory tract infections like the common cold. Consuming a Zinc supplement could be beneficial to those who are already sick.

I conclude that consuming zinc supplement may help protect against respiratory tract infections and reduce the duration of these infections.


Garlic has active anti-inflammatory and antiviral properties. It has been shown to enhance the Immune system by stimulating protective white blood cells like macrophages.

B Complex Vitamin

B Complex Vitamins are important to boost the Immune system include Vitamin B12 and vitamin B6 these vitamins are important for healthy Immune responses. Although many adults are deficient in these vitamins which can negatively affect their immune health. I am Dorcas; I would love to hear from you. Please leave a comment in the comment section below I will reply to you as soon as possible. Do like share and follow.

  1. Hi Dorcas! 

    Enjoyed reading about the immune system. I use elderberry everyday and it has helped keep me form getting the flu when my entire family had it. It also kept me from getting sick way less often. I did read that Elderberry does not help fight agains COVID but makes it worse. Have you done any research on that?

    • Hey Jordan; thanks for your comment. Elderberry, as well as some other fruits, is good for the Immune system because of the nutrient it contains.

  2. It is very crucial that our immune systems are in good condition. Too strong and it work against you. Too weak and you will have all sorts of infections. We need it to be just in the middle. Unfortunately, people who get sick are either on prescribed medicines that lower their immune system to fight infections and lack of a healthy diet, including lack of exercising. Is this supplement plant based and Non-GMO?

    • Hey John; thanks for your comment. With proper nutrition including daily exercise and rest, the immune system will be at a normal level”. not too weak not too strong.

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