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It usually lasts weekly for 4-8 weeks
Do not vigorously aspirate in immunization-style injections, but ensure not in a blood vessel (striking a vein is unlikely in recommended sites)
Gut 63 (5), 727735
Essential Guideline #1: Standard Dosage Ranges for Adult B12 Therapy Understanding the standard dosage ranges for Vitamin B12 injections is key for adults
Nature Reviews Endocrinology, 16(3), 135-146
For dietary deficiency where absorption is intact, oral B12 supplementation may be appropriate after initial loading doses
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