Some people are convinced that even if they do not suffer from colds and other ailments, their immune system still weakens at certain times of the year. In attempts to "strengthen" immunity, they start taking vitamins, hardening, and exercising. Is this really effective?
The idea that certain actions can "strengthen" the immune system seems quite appealing. However, unfortunately, immunity does not function quite that way. So, let's first clarify what it actually is. This will be helpful for those who do not remember biology very well.
The immune system of our body is divided into two main categories: innate and adaptive. The former is activated by any external influence, while the latter develops over time. When a new infection enters the body, immune cells strive to determine what disease they are dealing with. Once they figure this out, they skillfully create an immune response that becomes a "tried-and-true strategy." If the virus enters the body again, the cells already know how to act.
This principle of memory is the basis for many vaccines, which contain weakened bacteria or viruses. When the vaccine is administered, your immune system produces antibodies that help immune cells detect and destroy "invaders." It then remembers the infection, so that upon re-exposure to the pathogen, your body knows exactly how to eliminate it. It is important to understand that this process works in only one direction: first, there is contact, and then immunity is developed.
This cannot work in reverse, so the idea of "strengthening" the immune system makes no sense. Your body is either already trained or has not yet encountered a specific disease, and therefore yogurt is unlikely to help.
The problem with the flu and colds is that there are a vast number of rhinoviruses and flu strains, and there is no way to teach the body to fight all of them.
Scientists and medical professionals emphasize that the best way to support the immune system is not to interfere with its functioning. It is capable of handling itself at any time of the year, provided you do not suffer from serious illnesses. When you see recommendations for "strengthening" immunity, they are likely aimed at maintaining the right amount of cells, although this is still a contentious issue. Scientists have not yet reached a consensus on this matter, although there are several studies indicating that nutrition and lifestyle can support immunity (but not improve or strengthen it).
First of all, it should be noted that for the normal functioning of all body systems, a person needs about eight hours of sleep. As for nutrition, a balanced diet will keep your immune system in good shape. Research shows that protein can be particularly important for the immune system, and zinc also affects it. Additionally, it has been found that taking vitamin D reduces the risk of developing acute respiratory infections. One study conducted among schoolchildren in Japan showed that adding vitamin D lowers the risk of getting the flu.
In any case, taking any vitamins and supplements should be coordinated with your doctor.
