Mental clarity Because B12 supports nerve signaling, injections may help improve focus, concentration, and the foggy feeling associated with low B12 levels
Long-term risks are rare but may include nerve damage, leading to tingling, numbness, or weakness in limbs
For hematocrit and reticulocyte counts, recommendations are to repeat these tests daily from the 5th to 7th days of treatment and then frequently until the hematocrit returns to a normal range (11, 14, 15)
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For example, think of a two garden hoses, one smaller diameter and the other one larger
Clinical Chemistry (2014) 8