This can result in pale or yellowish skin, as well as weakness and shortness of breath. A study published in the American Journal of Hematology found that vitamin B12 deficiency was a common cause of ...
Related: 'I Was Diagnosed With a Rare Heart Condition At 25—This Unexpected Symptom Was a Huge Red Flag' In 2007, Korbitz was 20 years old and attending college at Colorado State University when he ...