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Protein is an essential nutrient found in animal products, nuts, and beans. The name protein name comes from the Greek word protos, which means âfirst.â Your body uses proteins in your diet to build new cells, maintain tissues, and synthesize new proteins that make it possible for you to perform basic bodily functions.
Why are vitamins necessary in diet? vitamins are essential in diet because they prevent diseases such as rickets,osteomalacia ,scurvy. vitamin d promotes absorption of calcium and phosphorus compounds from intesâ¦tines and enables the body to use these in formation of teeth and bones.