Common causes include: Pernicious anaemia Conditions affecting absorption in the stomach or intestines Certain medications Dietary insufficiency, particularly in strict vegan diets Increasing age Identifying the underlying cause is important because treatment recommendations may vary
B12 injections for weight loss begin supporting energy and metabolism soon after administration, though results vary by individual habits
B12 shots don't burn fat directly, but they support the energy, metabolism, mood, and immune system function that make weight loss significantly easier to stick with
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Brand name versions (Wegovy for semaglutide, Zepbound for tirzepatide) both list at approximately $1,000-1,300 per month without insurance