Can children eat before a trace element check?

Patient's question:

I don't know if he has this condition, and his mental state isn't good either. May I ask if children can eat before having their trace element check?

Doctor's answer:

Hello, do you want to do a hair test or a blood test? If it's a blood test, it's recommended not to eat beforehand. If it's a calcium deficiency, it's suggested to supplement calcium for treatment. You can have milk or water before the blood test.
Hello, according to what you mentioned, some babies naturally eat less, but they are still healthy. As long as the baby is in a good mood, has a good mental state, and normal growth and development, there's no need to worry too much.

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