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In addition, B12 deficiency-associated fatigue is often accompanied by other symptoms such as numbness and tingling, cognitive impairment (memory and concentration problems), mood swings (depression), skin changes (pale skin), shortness of breath, or fast heart rate
If the label says it contains B12 but the solution shows no color, either the B12 concentration is extremely low (possible but unusual), the B12 has degraded (possible if exposed to light), or there was a labeling error (possible at any pharmacy)
Then a maintenance of one injection monthly may be advised
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