Why is Protein essential in your diet, because it’s essential for your bodies to grow and stay healthy. It’s the stuff that makes up your cells, hormones and enzymes, as well as your skin, hair and tissues. You can find protein in a variety of foods, like seafood, meat and nuts, seeds and eggs. This article review why is protein essential in your diet, and its function, symptoms of deficiencies & excess intake, and many more information.