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Restoring adequate B12 levels can lead to noticeable improvements in mood, energy, and cognitive function

You have to get it from food or supplements

the label also warns that rash, hives, or swelling of the face, mouth, lips, or tongue can signal a hypersensitivity reaction requiring emergency care, though no generalized allergic reactions were documented in the original trials Because current supply comes only from compounded preparations rather than an FDA-verified finished product, potency, purity, and sterility can vary by pharmacy, and unregulated online sources carry added contamination or mislabeling risk

Chronic inflammation has been identified as a central feature in many patients, linking immune dysregulation to symptomatology such as fatigue and cognitive impairments