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[18] Lactation studies demonstrate that maternal injections modestly elevate breast-milk B12 concentrations without adverse infant outcomes, supporting compatibility with breastfeeding while underscoring the need for maternal repletion to prevent neonatal deficiency
Vitamin B12 Regulates Cytokines and Neurotrophic Factors A very new research field has brought to light astonishing new functions of B12 in the nervous system, which go far beyond its role as coenzyme and rather resemble the mode of action of a hormone: vitamin B12 regulates the level of certain neurotrophic factors such as neurotransmitters, growth factors and the so-called cytokines essential messenger substances that all assume a controlling function in numerous bodily processes (32)
