mechanism for action: 1.betaine is a kind of alkaloid of quaternaries. it can stimulate animals'senses of smell or taste and improve animals' ingestion. it is the main foodinducing ingredient of aquatic feed and has special stimulating and promoting action on ingestion of aquatic animals such as fish, shrimp, crab, eel, turtle and bullfrog. 2.betaine is also an inner salt of glycine, it acts as both amino acid and methyl-supplier in the course of animals' metabolism. it can join enzymatic reaction and has the function of resisting fatty liver. 3.betaine is a buffer for cataclysmic osmotic pressure.