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Zinc is a bluish-white metal that is soluble in alkali, acetic acid, and inorganic acids, but insoluble in water. It has high corrosion resistance in the atmosphere. The zinc content in the human body is about 0.003% of body weight, which is equivalent to about 2 grams of zinc in an adult's body. 90% of zinc is found in bones and muscles, and the remaining 10% plays an important role in the blood. Zinc is an essential mineral for the human body and is very important for the immune system and metabolic function. In developing countries, approximately 20 billion people are affected by zinc deficiency, which causes growth retardation, reduced immunity, diarrhea in children, as well as amenorrhea, sexual dysfunction, narcolepsy, loss of appetite, and reduced IQ.

Chondroitin generally refers to chondroitin sulfate, a glycosaminoglycan extracted mainly from mammalian cartilage and the main component of the extracellular matrix of mammalian connective tissue. Its appearance is white or light yellow amorphous powder. It has strong water absorption, is easily soluble in water and becomes a viscous solution, and is insoluble in organic solvents such as ethanol, ether, and acetic acid.