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Concentrations above 2 percent are rarely necessary and may increase irritation risk without proportional benefit
Signs of B12 deficiency include fatigue, brain fog, poor concentration, and low energy
FDA-approved for treating B12 deficiency
This might sound high compared to the NIH's Recommended Dietary Allowance of just 2.4 mcg daily for adults, but don't worry the injection method allows for safe delivery of these higher doses, and B12 is water-soluble, meaning your body efficiently eliminates any excess
[PubMed | ClinicalTrials.gov | DOI] Rubino D, Abrahamsson N, Davies M, et al
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