In the history of our country, there have been periods of long-term lack of food and clothing, so the shadow of lack of nutrition has enveloped several generations. However, today, when the living standard is better, some people will still panic about the lack of nutrition, especially some people are keen to detect the level of trace elements in children’s bodies. For example, some parents think that children with bald pillows are calcium deficient and may check [blood calcium] for their children. There are also some parents who think that their children do not like eating because they lack zinc and may check [blood zinc] for their children, etc. Is trace element detection really that useful? What is a trace Read More …