We take protein mainly for the amino acids. We as human beings need amino acids to heal our bodies and function properly. If we are low in protein we can be tired, nervous, and have malnutrition “Marasmus/kwashiorkor.” Proteins do a lot in our bodies. They are involved in the structural “hair, skin and muscle” and regulatory “hormones, Immune system proteins, enzymes ect..” Our bodies create about 300 grams of protein a day to function. About 100 grams comes from dietary amino acids. If you are eating a high protein diet remember to take in extra water. Proteins use up to 7 times more water to be metabolized than fat or carbs. So, drink plenty of water. Protein is very important to health even if you are not lifting weights. I think .8 to 1.0 grams per body pound is more than enough to intake per day. We take protein because we need to make sure we are getting the essential amino acids for proper health and function. Those amino acids are Phenylalanin, Isoleucine, Leucine, Lysine, Methionine, Threonine, Valine, and Tryptophan.