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Third-party testing certificates of analysis (COAs), ideally with HPLC and mass spectrometry data, are the main quality-assurance tool available
For many, particularly those with underlying malabsorption issues like pernicious anaemia, injections are demonstrably more effective and stronger in their ability to deliver B12 directly into the bloodstream, bypassing the digestive systems limitations
Common excipients include microcrystalline cellulose, lactose and magnesium stearate
People who dont produce enough intrinsic factor can become deficient
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