- and supplements strengthen their immune system

Zinc is crucial for the immune system on multiple fronts. Animal-based foods such as meat and eggs are the best sources, as zinc from plant-based sources is less readily absorbed. As a result, vegetarians and vegans often have insufficient zinc intake. On the other hand, zinc supplementation can enhance the production of interferon and other components of the immune system, which are particularly important for defending against viral infections. This is highlighted in a study published in Clinical Nutrition. It is also important to note that aging and certain medications can increase the risk of zinc deficiency.