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People with Certain Medications Long-term use of certain medications, like proton pump inhibitors, H2 receptor antagonists, or metformin, can interfere with B12 absorption
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Individuals who have had gastrointestinal surgery, such as weight loss surgery, may also have fewer cells through which to secrete stomach acid and intrinsic factor, inhibiting B12 absorption
These labs follow guidelines to ensure compounded medication safety and quality
Some people see rapid early results
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