Dark Chocolate:
Dark chocolate is also a very popular food for enhancing the functions of the immune system and also helps in increasing the resistance of the body against infections and other immune diseases. The cacao present in dark chocolate and the Phenolic compounds present in cacao significantly strengthens the defense mechanism of the immune system. There is a variety of flavonoids present in dark chocolate, which act as antioxidants and protect the body from cellular damages and reduces the signs of inflammation.