Vitamin B12 is a powerhouse nutrient that plays a huge role in keeping your body running smoothly
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These include vitamin B12 deficiency and malabsorption that is caused by the following medical conditions, according to the NIH [1]: Pernicious anemia Tropical sprue Pancreatic insufficiency Surgery in the gastrointestinal tract Certain medications Deficiency in the diet Side effects of B-12 injections Also, according to the NIH, vitamin B-12 injections have some potential side effects, including [1]: Diarrhea Itching Swelling Risk of allergic reaction and anaphylaxis Can Vitamins Aid in Weight Loss
[10] Minor side effects may include diarrhea, nausea, upset stomach, and itchiness
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Folic Acid Deficiency: You will likely have concomitant folic acid deficiency if you have severe vitamin B12 deficiency