Book excerpt: This new volume discusses the valuable contribution of immune-boosting properties of nutraceuticals and functional foods toward human health, exploring dietary antioxidants, vitamins and minerals, edible microalgae, herbs, phytonutrients, omega 3-fatty acids, and probiotics. The volume addresses the immune-boosting properties of herbs and vegetables and the pharmacological and therapeutic importance of commonly used medicinal herbs and carotenoids-containing vegetables and their immunological and biological actions for treating disease and maintaining health. Several chapters focus on marine-derived sources used to boost immunity, such as microalgae-derived compounds and compounds from coral reefs, which can promote better health and alleviate the risk of development of degenerative diseases.