Some medical experts believe that the increase of metal ions in the human body is the cause of human aging  In 1978, several scientists made an interesting experiment on an invertebrate rotifer  The healthy rotifers were divided into two groups  One group was injected with a substance that can eliminate metal ions
As a result, the life of rotifers injected with this substance was much longer than that of rotifers not injected, The increasing of metal ions in human body is the cause of human aging
Some scientists have studied the causes of human aging through experiments.