Functional protein are those ingredients that cause biological effect on human or animal consumption. For example, soybean consists of an ingredient viz. trypsin inhibitor, which enhances animal and human body ability to easily digest protein. The soy-based foods are treated by heat treatment to weaken the enzyme's three-dimensional structure, thus causing the inability to inhibit trypsin. Proteins are considered to be the key molecules of cells. Proteins are involved in virtually any function of the cells. While some type of proteins backs up to structural support; others are involved in germ defense. Functional proteins are essential for keeping the body functioning in day to day life. As functional proteins are known to grow, sustain and create every body part— from our hair and skin to our immune systems and digestive enzymes, this is not limited to athletes but is the necessity of each person. In beauty and personal care products demand for plant proteins is growing. Hydrolyzed soy protein, for example, is rich in amino acids which are considered one of the best for both skin and hair. With health-conscious population growing demands, North America is expected to dominate the functional protein industry throughout the forecast period.