1.  The Physical Characteristics and Chemical Structure of Lycine

Lycine, with the molecular formula as CH33N+CH2COO-, being similar with amino acid, it belongs to quaternary ammonium hydroxides substance. Being flowable in appearance, to be crystal powder in little brown , with the melting point as 293 centigrade, Lycine is soluable in water easily, and can be soluted in methyl alcohol also.
2. The Function of Lycine

Lycine has many funtions, to be the supplier of methyl, it can promote the metabolism of fat in human body, easy up the excitement, adjust the osmosis pressure, furture the appetite and stabilize the vitamin, so and and so forth.

2.1. To be the Supplier of Methyl
      The concept of methyls transshipment in human body has been attracking peoples attention more and more. It is ordinarily considered that the methyl can not be synthesized in human body itself, and the food containing methyl wealthily is necessary, for such kind of substance, it is called as the supplier of methyl. Lycine can replace the choline partially, to be the source of methyls supplier. Choline should be tranformed to Lycine in human body firstly, then can be the supplier of methyl; Moreover, there are many chemical compounds in daily grain, such as the carrier of ion, can restrain the cholines oxidation in mitochondrion, and the rate of employment of methyl is reduced accordingly, therefore, to use Lycine directly is to be more effective.
2.2. Promoting the Fats Metabolism and Restraining the Fatty Liver
     After testing, it is proved that Lycine can promote the fats metabolism well, and  eliminate the unnecessary fat in liver effectively, therefore, Lycine can be used to prevent and cure fatty liver and other related diseases.

2.3. Adjusting the osmosis pressure in human body
     Choline can not synthesize Lycine in a large quantity in the condition of excitement, in order to adapt the human bodys requirments to Lycine, adding some Lycine in food, to make the Lycine  as the protector for osmosis pressure in the condition of excitement. For the above mentioned, using Lycine  perhaps is more important than saving some methionine.