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Intrinsic factor, produced by parietal cells in the stomach lining, binds to free b12 and enables absorption in the terminal ileum
Never recap needles using the traditional two-handed method
If you're taking it as part of a multivitamin like Building Blocks, morning with breakfast is the simplest approach
Digestive issues, ageing, gastrointestinal surgery, and certain medications can also lead to malabsorption
Older adults are at a higher risk
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