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Immune system and vitamin D

Why does every human being have an immune system?

The main function of the immune system is to protect our body against bacteria, viruses and fungi. So a strong immune system protects people against illness.

With a weak immune system, a cold or worse illnesses are more likely.

How does the human immune system work?
Our body can distinguish between foreign (e.g. bacteria, worms) and good (e.g. intestinal bacteria) pathogens. Through contact with a pathogen (e.g. viruses), defence mechanisms are activated. Depending on the type of pathogen, different cells of the immune system become active. These are white blood cells (lymphocytes) that take on specific tasks. Put simply, they recognise the invader, form antibodies and eat it up. If this protective system did not exist, bacteria, viruses and fungi could attack and infect the body's cells. A healthy immune system can defeat most infections. If the immune system is weakened, the symptoms may be more severe or the illness may last longer.

How can the immune system be strengthened?

A healthy diet provides important vitamins and minerals. For example, vitamin C, vitamin D, zinc and selenium are very important for the immune system to function properly
- Daily physical exercise in the fresh air stimulates the circulation, helps to reduce stress and thus also strengthens the immune system
- A good night's sleep promotes the regeneration of the body and thus also the immune system
- Smoking, alcohol and being overweight can weaken the immune system

Why is vitamin D important for our immune system?

Vitamin D activates important cells of the immune defence. It supports the production of the body's own defence substances and stimulates the destruction of pathogens by macrophages. So if there is too little vitamin D, the immune system is less efficient.

Vitamin D thus contributes to the normal function of the immune system.

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