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Vitamin B12 (Cobalamin) What it is An essential vitamin that plays a key role in red blood cell production, nerve health, and energy metabolism
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Always consult with a healthcare professional before starting any new skincare routine or supplement
They're also better if you have limited time, lack formulation experience, or want a product with a longer shelf life
For patients whose levels fall in the borderline or gray zone, a methylmalonic acid (MMA) test provides greater specificity MMA levels rise when B12 is functionally inadequate at the cellular level, even if serum B12 appears borderline normal
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