In addition to physical exertion, fatigue can be brought on by conditions like arthritis, anemia, fibromyalgia, chronic fatigue syndrome, colds, flu, eating disorders, sleeping problems, autoimmune disorders, and diabetes
Vitamin B12 is necessary for formation of red blood cells in bone marrow
Because the symptoms are so varied, B12 deficiency is often misdiagnosed, making accurate testing the only way to get a clear answer
If nausea limits fluid intake, patients should consult their prescriber about antiemetic medications
A 300 mcg dose equals 0.06 mL, or about 6 units