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For this reason, we based the target weekly absorption from EFSA by dividing their daily recommendations into three meals and applying a formula devised by Stephen Walsh of the UK Vegan Society (see Cyanocobalamin Absorption below)
Because these tests dont always show the full picture, its best to measure at least two parameters before diagnosing a B12 deficiency
The compound-level mechanisms are covered in KLOW Peptide Mechanisms
Individuals with risk factors for B12 deficiency including strict vegans, those with gastrointestinal conditions, patients taking long-term metformin or proton pump inhibitors, and older adultsshould discuss screening with their GP, even in the absence of obvious symptoms
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