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Deficiency is widespread, with peer-reviewed research describing it as a global health concern affecting populations across all age groups and geographies (Cashman et al., American Journal of Clinical Nutrition , 2016
Risks and Possible Side Effects Vitamin B12 injections are generally very safe when administered appropriately
This approach mirrors how longevity-focused clinicians use other interventions, prioritizing a sustained, low-amplitude signal over a short, high-amplitude intervention
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