At 1500 BC, people began to use zinc minerals in the treatment of skin diseases;
In 1934, scientists found that animal ’s growth needs zinc;
In 1961, Bai rasa and others found a group of people suffering dwarfism due to zinc deficiency in Iran
In 1969, an US doctor Clayderman found that taking zinc helps to accelerate wound healing;
In 1980s, taking zinc treated male infertility and impotence successfully;