The most important trace elements needed by the human body are calcium, iron, potassium, magnesium and zinc. Calcium is mainly found in milk, eggs, soy products, cod liver oil and seafood. Iron is mainly found in lean meat, seaweed, nori, fungus and green leafy vegetables. Potassium is mainly found in bananas, oranges, vegetables, nuts and mushrooms. Magnesium is mainly found in cereals, beans, mushrooms and peppers. Zinc is mainly found in scallops, oysters, meat, animal offal and nuts. Drug supplementation, currently on the market common calcium supplementation drugs are seen in calcium carbonate vitamin D, calcium phosphate, etc.. Iron supplements are mainly found in ferrous sulfate, ferrous succinate, etc. Potassium supplementation drugs are mainly seen in potassium chloride, magnesium supplementation drugs are mainly seen in magnesium sulfate, zinc supplementation drugs are mainly seen in zinc gluconate, zinc sulfate, etc.