Beef
Beef is rich in zinc, an important mineral for boosting immune systems. It is important to know at a mild deficiency of zinc would increase the risks of infections. This component plays a key role in the production of white blood cells. Consuming beef regularly will help your body strong enough to fight against foreign pathogens. A 3-ounce serving of beef can meet around 30% of daily intake for zinc. This is basically enough to prevent a deficiency. [8]
