side effects from vitamin b12 injections in humans B-12 Benefits | Uses | Oral Vitamin B12 Side Effects
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"Interview: Samuel L
Nevertheless, there are reports that excessive intake can have effects on the skin, the nervous system, and, in some diseases, on the risk of cancer or kidney function
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It may take several weeks before you get the full benefit of this medicine and you may need to take it for the rest of your life
