10 Essential Nutrients for Immune Health Flavonoids – a type of phytochemical – compound in plants, namely fruits and vegetables, that have health promoting effects. Antioxidant, having anti-inflammatory activity, improve immune system function, can inhibit viral activity and provide an immune system boost. Foods – spinach, cabbage, olives, broccoli, kale, onions.  Red and purple fruits, apples,… [ Read More ]