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Strength: 1,000mcg/mL (10,000mcg/10mL) Bacteriostatic water and mixing syringe will be provided for reconstitution
Thats not what they are for
The NIH Vitamin B12 Fact Sheet for Health Professionals notes that oral supplementation is appropriate for many patients who do not have intrinsic factor deficiency
Research shows that vitamin B12 has a half-life of 6 days in the blood, making it six days before the administered amount gets excreted from your body
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