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That is a very different statement from they do nothing. It means: The mechanistic rationale is real
"Obese children and adolescents: a risk group for low vitamin B12 concentration"
This greatly improves their life quality
The body is not designed to produce vitamin B12 naturally
They may also repeat blood tests to assess vitamin B12 levels and other markers related to deficiency, helping determine whether the current injection schedule is meeting the patients medical needs
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