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Sangle, Prerna, et al
Your dose may change depending on how you respond to the treatment and the vitamin B12 levels in your blood
You may be vitamin B deficient if you experience some or all of the following unexplained symptoms: Skin cracks around the mouth Scaly lip skin Skin rashes Fatigue Anemia Depression or irritability Confusion Diarrhea or constipation Abdominal cramps Tingling or numbness in your feet and hands Vitamin B12 deficiency is particularly serious, as it increases your risk for neuropsychiatric disorders
doi:10.1186/s40200-016-0250-x
Nature Chemical Biology
Still, the following will usually appear tired, pale skin, weakness, shortness of breath, a fast heartbeat, and a feeling that you are out of breath
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