Betaine anti-tumor, blood pressure, anti-ulcer and gastrointestinal dysfunction, treatment of liver diseases. As a feed additive methyl donor has provided function can save some methionine. Regulate osmotic pressure, ease stress, promote fat metabolism and protein synthesis, increase lean features, and can enhance the efficacy of anti-coccidiosis drugs. Attractant is used in aquatic animal feed. Betaine is an alkaline substance, has a strong hygroscopic property, so the fabrication process is often treated with anti-caking agent, its molecular structure, the application effect was no significant difference with natural betaine, belonging to the chemical synthesis of natural products equivalent thereof. Betaine high solubility, without electrostatic charge, its high concentration had no effect on many enzymes and other biological macromolecules, and even have a protective effect. Beetroot Betaine can protect cell membranes and prevent heat damage, improving enzyme thermal denaturation temperature required; can protect spinach thylakoid membranes withstand freezing stress; lift the high concentration of salt on the activity of the poison; prevent dehydration-induced protein thermodynamics interference; aerobic respiration and energy metabolism have good protection. Betaine onPSH Polypeptides having an outer peripheral stabilizing effect. Betaine synthesis in vivo and can quickly accumulate to a high concentration, it has no feedback inhibition in biosynthesis reactions and produce NAOH. In the study of over 150 kinds of metabolites, betaine is best osmotica, very low concentrations of exogenous betaine that has a good effect. When affected by salinity or water stress, cytoplasmic accumulation of large amounts of organic osmotic adjustment agents such as betaine, and the cytoplasm inorganic osmotica mainly Jixiang vacuole help make the cell cytoplasm and vacuole) external environment to maintain osmotic balance this avoids the cytoplasm of high concentrations of inorganic ions on the enzyme and metabolic poison. Under salt stress in plants accumulate betaine is an important physiological phenomenon in favor of plants under stress growth, its content and plant salt tolerance were positively correlated.