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Cortagen acts on the brain and nervous system, with potential relevance to neuroimmune conditions like MS

Cell Death Dis

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The nasal mucosa is highly vascularized, allowing absorption directly into circulation, and some evidence suggests nasal administration may provide more direct central nervous system access via the olfactory pathway

You may benefit from more B12 if you experience: Constant fatigue or weakness Numbness or tingling in hands or feet Poor concentration Low mood or irritability Shortness of breath If these sound familiar, speak with a healthcare provider

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