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At first, vitamin B12 injections are given every day for 1-2 weeks
As the condition worsens, common symptoms include: weakness and fatigue light-headedness and dizziness palpitations and rapid heartbeat shortness of breath a sore tongue that has a red, beefy appearance nausea or poor appetite weight loss diarrhea yellowish tinge to the skin and eyes
[6] [3] [10] A mild deficiency may not cause any discernible symptoms, but moderate deficiency can cause various symptoms, such as feeling tired, lightheadedness, headaches, cold intolerance, pale skin, sore tongue, upset stomach, loss of appetite, hair and skin color changes, numbness or tingling (pins and needles) of the fingers and toes, and tinnitus, and vision, cognitive or psychological problems
Temperature-sensitive medications are subject to state and federal requirements and may take longer to ship
Are there any long-term benefits of regularly receiving Vitamin B12 shots
In terms of how soon: some effects (like improved alertness) can be within a few days
