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Your body doesn't produce B12you must get it from food or supplements
A sealed vial is good until its printed date, usually 2 to 3 years out
Deficiency leads to nerve damage (neuropathy), which presents as numbness, tingling, or weakness
Leaving it on the counter, even for a few hours, accelerates degradation
Support Mood & Brain Function B12 helps synthesize mood-related neurotransmitters like serotonin and dopamine
These outcomes reflect observed biomarker and pathway changes under controlled conditions and are not established therapeutic claims
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