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Symptoms of vitamin B12 deficiency Other various symptoms of B12 deficiency include: A swollen, inflamed tongue Dizziness Shortness of breath Pale skin Muscle weakness Numbness or tingling in hands and feet Tiredness (low energy) Weight loss Infertility Irregular or increased heartbeats Constipation Appetite loss Flatulence Low mood (depression) High blood pressure or very low blood pressure Vitamin B12, Vitamin B6 and Folate There is a strong interrelationship between vitamin B12, vitamin B6 and folate (also known as vitamin B9)

However, the cost of nurse time in administering the dose is enough to make health services consider saving some money and time by replacing injections with tablets

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Various medical conditions, such as celiac disease and Crohns disease, can also impact vitamin B12 absorption, making injections a valuable solution for affected individuals