The immune system plays a key role in protecting the body from disease, infection and external factors. For those struggling with its weakening - whether due to autoimmune diseases, chronic stress or nutritional deficiencies - a well-balanced diet can be the foundation for improved health. A healthy diet for people with immune system problems not only provides essential nutrients, but also supports the body's regeneration, reduces inflammation and strengthens natural defence mechanisms. In this article, we will discuss what such a diet is, which foods to include and which to avoid, and how lifestyle affects immunity.