Zinc supplementation without zinc deficiency can easily cause too much zinc in the human body. Too much zinc can also cause certain disadvantages to the human body: First, if there is no zinc deficiency in the human body, zinc supplementation can easily cause the human body to supplement zinc in excess, which can cause metabolic disorders, resulting in adverse symptoms such as headache, nausea, abdominal pain, diarrhea, and weakness in the human body. Second, excessive zinc supplementation can also lead to damage to the human brain nerves, resulting in memory loss, distraction, drowsiness, mental depression and other adverse symptoms. Three, not zinc deficiency zinc supplementation causes the body’s zinc excess is difficult to be discharged, too much zinc in the body will also inhibit the absorption and utilization of other elements and substances, including iron, calcium, copper and vitamin C, easily cause the human body to appear iron deficiency anemia, osteoporosis, immune system decline and other adverse symptoms, need to pay attention to.