b12 injections for pernicious anemia (Rare Cause of Vitamin Deficiency) Cyanocobalamin Injection – 1000 mcg/mL

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Cardiovascular Support: It helps regulate homocysteine levels

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Intestinal epithelial NAD+ biosynthesis regulates GLP-1 production and postprandial glucose metabolism in mice

If you're not getting enough B12, you can experience anemia, fatigue, weakness, constipation, decreased appetite, weight loss, dizziness, lightheadedness, confusion, poor memory, soreness of your tongue and mouth, and tingling and numbness in your hands and feet, according to Harvard Health Publishing