In January 1977, the United States Senate “Nutrition Special Committee” presented a conclusion for the 5000-page report, “imbalance diet and lifestyle are the root causes of all diseases. Linus Pauling, the only person who had won two undivided Nobel Prizes once said “The best nutriology will be future medicine along with emergency of these authoritative conclusions; health care has become more and more important. Nutriology of maintaining health through improving dietary habit and physique has gained much attention nowadays. Talking about nutriology, protein, the ultimate nutrition is definitely one of the discussion topics.

The basic unit of protein is amino acid, which is formed by elements of carbon, nitrogen, oxygen and hydrogen. Amino acid is the smallest message-carrying unit while every single amino acid also has specific physiological function on human body.

Protein is crucially important for our body, as it accounts for 54% of our body weight. Every part of our body is formed by protein, from external parts like hair, skin and limbs to the internal parts like heart, liver, spleen, pancreases and even the emotion. Therefore protein is the foundation of life as:

1. Protein is the basic substance that constitutes human body and it is the primary nutrient of body.
2. Protein is the main forming substance of body tissue.
3. Protein has specific physiological functions in living body; for instance, catalyse chemical reactions in the body, regulate physiological activities and emotional state.