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An injection bypasses that route
B12 (typically cyanocobalamin or methylcobalamin) is placed directly into the muscle, so it is reliably absorbed into the bloodstream and carried to the cells that need it
Complete symptom resolution, particularly for neurological complications, can take 318 months of regular treatment depending on deficiency severity
If you have received injections for several weeks and notice no change, tell your provider
If taking oral supplements, it usually takes 2 to 4 weeks to feel a significant difference as levels build up in the body
If you have low B12 or a true deficiency, these shots can work wonders Image content: This image is available to view online
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