The immune system is the complexity of organ, cell, and protein networks that work together to protect the body from attacks by viruses, bacteria, fungi, and other germs. When various pathogens enter the body and cause damage, the immune system's task is to heal and adapt to future threats. There are many ways to support a healthy and strong immune system, one of which is by paying attention to the types of food consumed.

Vitamin D is one type of vitamin that plays a direct role in maintaining optimal immune system health. This is due to the presence of vitamin D receptors in most cells of the human immune system. The presence of vitamin D affects the performance of the immune system, making it important in supporting immune function. Vitamin D can be found in sufficient amounts in fatty fish such as mackerel and salmon.

Vitamin B6 has a main role in the production of interleukin and T lymphocytes, two important components in optimizing the function of the immune system. Chicken breast can be served in various ways, such as smoked, grilled, or processed together with whole and fresh foods.

Green leafy vegetables have high nutritional and fiber content, supporting intestinal health and meeting most of the body's daily nutritional needs. Kangkung and spinach, for example, are green leafy vegetables that are rich in nutrients and fiber. Consuming various types of these green vegetables in their fresh state or as part of a salad, which can be combined with fruits and lean protein, can also support a healthy immune system.