Green leafy vegetables like spinach, kale, and bok choy are rich in vitamin A, C, and K. They also contain high amounts of antioxidants. 

Fruits loaded with vitamin C like oranges, grapefruits, and lime are great for summers as they improve immunity and protect against infections. 

It is the best option for consuming antioxidants and hydrating the body in the summer. It is rich in catechins which is known for improving immunity. 

Foods like yogurt are full of probiotics which improves gut health and boosts immunity.