Protein is an essential source of your diet, but if you eat too much it can be bad. Amino acid is the building block or protein. Protein serve as enzymes, that break down other components, hormones that help us with recovery and growth. Also they help regulate fluids and electrolytes. ½ of or protein is in our muscle and it provides 4 kcals/gram. There are essential proteins, meaning that you have to eat them, such as histidine and isoleucine. Nonessentials, which the body makes, are not essential to your diet. Some are alanine and glutamic acid. Conditional proteins will be produced when the body is healthy. A complete protein source has all essential amino acids, like meat, fish, and eggs, most come from animals. They body can’t store protein so, if you have to much it converts to fat. Too little and your body will break down its body muscle to get energy. Protein is a macronutrient that we need, we should get 10-55% of our calories from protein. Men need, on average, 56 grams per day. Even though there are good and bad sources, protein is an essential part of your diet. You should steer towards eating fish, poultry and some red meat.