Peptides are a source of nutrient for cells and the “best helper” for repairing cells. Peptides are healthy food that provide nutrient for cells, and it can repair cells basically. Peptides are the form of life, the only method for protein to play function and the messenger of transferring life. Therefore, nutrient absorbed by cells must through the active effect of peptides. Small molecule active peptide is professional nutrient for cells, its average molecule weight is 180-500 DA , so it can absorbed by intestine, blood vessel and skin without any digestion. With the characteristics of regulating physiological function of systems and cells, providing energy and repairing cells. Therefore, it can as nutritional supplement to keep healthy.