Green Smoothie

Green leafy vegetables, particularly dark green leafy vegetables, are high in vitamins, minerals, and antioxidants. They not only aid in the fight against infections, but also in the regeneration of immune system cells. 2 cups of spinach per day can meet your daily vitamin A, vitamin K, and folate requirements. Spinach is also high in vitamin C and betacyanin, which help the body's immune system. Kale contains vitamins A, C, K, E, and folate.

Cucumber contains manganese, copper, potassium, and vitamins that help keep your immune system healthy, whereas celery has antimicrobial properties that aid in the fight against infections. You can customize your green smoothie by adding two spoons of probiotic yogurt or juicy fruit to the blender.