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Alternate injection sites include the outer thigh or upper arm fatty tissue if rotating sites to prevent lipohypertrophy (tissue buildup from repeated injections)
The aim of this systematic review and meta-analysis was to critically assess and compare the effectiveness of different vitamin B12 administration routes in correcting deficiency
Patients with pernicious anemia This autoimmune condition destroys intrinsic factor, the protein required for B12 absorption in the small intestine
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Guests with new, severe, persistent, or unexplained symptoms
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