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Description
Vitamin B12 levels in the milk of nursing mothers approximate the mother's blood levels of vitamin B12

Is blood withdrawal for medical or anti-doping tests allowed

Neuron 20 , 847854 (1998)

doi:10.7326/0003-4819-147-10-200711200-00187

Bringing levels back within a healthy range allows the body to process macronutrients more efficiently

The experimental group was blinded to the experimenter during the analysis
