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Key parameters are tracked by statistical process control, and direct comparisons can be made using reference standards from past runs
That doesn't mean you can't be sensitive to something in the B12 or B complex that you took or even B12 itself
127 Two observational studies reported similar findings of 50% to 64% of patients experiencing clinically significant improvement using a similar dosing regimen at up to 19 months of follow-up
Possible side effects may include mild nausea, flushing, or a temporary metallic taste, but most side effects are rare and short-lived
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