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JCI Insight (2020) 5(17):e136215
WARNINGS: Keep out of reach of children
Sancar, A., Lindsey-Boltz, L
Immune System Enhancement Vitamin B12 contributes to immune function through several mechanisms: It supports the production of white blood cells, particularly natural killer cells It helps regulate immune system responses It supports cellular energy needed for immune function It contributes to gut health, where much of the immune system resides During periods of increased immune challenge, such as seasonal changes or times of stress, B12 injections can provide valuable support to your body's natural defence mechanisms
Keep in mind that most preclinical research has used injectable delivery, so the oral bioavailability question is relevant context for your evaluation
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