B12 increases energy and metabolic rate while supporting weight loss, but it's most effective when combined with proper diet, exercise, and stress management rather than used as a standalone solution
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Individual Factors Affecting Dosage Requirements Even though the standard dose is 1000 mcg, individual needs can vary
As the However, while risks of severe toxicity are low, some side effects are still possible, such as: temporary symptoms, such as itching, swelling, or diarrhea allergic reaction damage from the injection hypokalemia, or low potassium levels infection negative interactions with certain medications, such as: metformin (Fortamet, Glucophage, Riomet) medications to reduce gastric acid, such as proton pump inhibitors or H2 receptor antagonists Always talk with a doctor before using vitamin B12 supplements