Book excerpt: Nutritional security and ecosystem sustainability are the biggest challenges of the 21st century. Globally ~ 2.3 billion people suffer from malnutrition. According to estimates by the World Bank, malnutrition globally costs ~ $ 3.5 trillion per year. On the other hand, the production and availability of staple food is the major emphasis for conventional farming in developing and underdeveloped countries for assured food security. These staple foods are high in carbohydrates and energy availability but low in nutritional value, such as concerning micronutrient, phytochemical, and vitamin contents. Apart from adequate food, there should be consistent access, availability, and affordability of foods and beverages that are nutrient-dense, promote well-being, and minimize diseases. From the experience of the recent COVID-19 crisis, the importance of adequate dietary habits has been emphasized globally since food nutrients are considered inherent sources of immunomodulation.