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We recommend starting with the same daily schedule for three months, until symptoms stop improving, and then starting to test
Brand versus compounded formulations involve tradeoffs
When B12 levels become problematic: High-dose supplementation (particularly doses exceeding 1,000 micrograms daily) Frequent B12 injections without medical supervision Underlying conditions affecting B12 metabolism Concurrent use of multiple B12-containing supplements The NHS does not set an upper safe limit for vitamin B12 because harmful effects from excessive intake have not been definitively established
Meaning the absorption of B-12 depends on a protein produced in your stomach called intrinsic factor
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