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The upstream variable number tandem repeat polymorphism of the monoamine oxidase type A gene influences trigeminal pain-related evoked responses
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When your B12 levels are low, you may experience: Chronic fatigue and weakness Difficulty concentrating or memory loss Tingling or numbness in your hands and feet Mood swings or increased irritability Pale skin and shortness of breath B12 injections are a direct, effective way to restore optimal levels for those with malabsorption issues (such as people with gastrointestinal disorders, vegetarians, or those taking specific medications)
Some feel nothing until the second or third dose
Adjustments happen there first, before any supportive injection is added
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