The common detection methods of trace elements in human body are blood detection and hair detection. Theoretically, blood reflects the present situation of trace elements in human body, while hair reflects the relatively long-term situation in a few months.
Blood tests are generally accurate, but two or three milliliters of venous blood are needed. If you only take a drop of blood, you can only detect basic indicators such as hemoglobin at most. Hair detection is more convenient. When the hair is not polluted, you should cut a pinch of hair at the back of your head and stick it on your scalp. The one or two centimeters near the scalp is the most accurate, so cut more.
The deficiency of trace elements in infants mainly depends on their clinical symptoms, not just the test data. Generally, children after 6 months old have clinical symptoms of trace element deficiency, and the detection of trace elements should be considered in combination with their growth and development (height, weight, etc.). ) and feeding conditions.
For example, children with zinc deficiency will have symptoms such as anorexia, backward growth and development, and poor resistance; Excessive blood lead can cause symptoms such as low immunity, inattention, decreased IQ or physical retardation. If the child grows well, there is no need to do routine trace element testing. To ensure children's nutrition and prevent the lack of trace elements, the most important thing is to have a balanced diet and educate children to develop good eating habits instead of blindly supplementing various nutrients.