Elizabeth City NC, Chiropractor Some key nutrients, including vitamin C, D, and zinc, are important for supporting your immune system. Little wonder these nutrients and their supplements have been prescribed from the earliest days of the COVID-19 pandemic. Generally, an unprocessed, whole food diet supports a healthy immune system. And your daily diet should include fruits, vegetables, low-fat dairy, lean protein, and whole grain. Adding these types of food to your diet helps you get the essential macronutrients, vitamins, and minerals that are needed for a healthy immune system. Vitamin C Vitamin C is a water-soluble vitamin that supports your immune health. This vitamin can help you fight cold or ease your cold symptoms faster if you take it before the onset of sickness. Vitamin C has antioxidant and anti-inflammatory properties that help to reduce the risk of diseases.