Calimet series of amino acid chelates are manufactured using exclusive production technology in China through the chelation of hydroxyl methionine and other trace elements in proportional molecules. Numerous trials in animals show that these products possess highly stable atomic structures, and they are safe, non-poisonous and do not act as a stimulant. They can be used with vitamins and antibiotics with no antagonistic after-effects. With low molecular weight, they can be absorbed by methionine in animals' digestive tracts. The biological utilization rate is high and it can improve animal growth and boost torso development.