This document discusses 6 key nutrients: vitamins, minerals, fats, carbohydrates, water, and protein. It provides details on vitamins D and A, explaining their roles and common food sources. It also distinguishes between macro and trace minerals. The document describes the three types of fats and two types of carbohydrates. It notes that water is essential for hydration and composition of the body. Finally, it states that protein is needed to build and maintain muscles, listing common protein sources.