Feed Your Immune System Eating to support your immune system doesn't have to be complicated or expensive. As a matter of fact, as I previously declared 2020 the year of simplicity, boosting your immune system is one of the most simple things to do. There are three main food categories to keep in mind: 1. Vitamin C- a powerful antioxidant that supports the respiratory system. Foods rich in vitamin C go beyond orange juice. Strawberries, kiwi, and bell peppers are also good sou