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Four compounds
Don't expect overnight results
[1] If you experience persistent or concerning symptoms after starting B12 supplements, particularly skin changes or gastrointestinal issues, it is advisable to discuss these with your GP rather than assuming they are directly caused by vitamin excess
It's intended for single-dose reconstitution: open the seal, draw out what you need, discard the remainder
Research-use-only notice: All products discussed here are sold for laboratory and research use only
Typically, plasma or serum B12 levels are measured, with the ideal range for adults between 170 and 250 pg/mL
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