Magnesium ion is an essential trace element in the body and participates in the production of polymerase in the body. If there are few polymerases in the body, the nutrients we ingest will not be well absorbed, but magnesium ions are only trace elements and cannot be ingested too much. Generally, the water we drink is rich in magnesium ions, so the average person's body will not lack this trace element. In addition, the intake of magnesium ions should not be too much, otherwise it is likely to lead to excessive accumulation of magnesium ions in the body, causing physical discomfort.