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Continue with lifelong intramuscular injections, even if symptoms have improved or are no longer present 1 Frequency The frequency of injections varies from country to country
For larger volumes, repeated dosing or clients with limited deltoid mass, the ventrogluteal site is the safer alternative: it carries the greatest muscle depth and sits away from major nerves and vessels
Last reviewed: May 28, 2026 Last updated: May 28, 2026 Written by: Jay Hastings, CEO of PlexusDx Jay Hastings is the CEO of PlexusDx, a precision health company focused on genetic testing, blood biomarker insights, and personalized wellness recommendations
adults over 60 have a true B12 deficiency, and roughly 20% have marginal B12 status, according to research published in the American Journal of Clinical Nutrition
Roll the vial gently until the solution is completely clear
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