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I purchased VitaStir MIC B12 and it definitely helped with energy
A vial left in a hot car has been outside its labeled conditions, and you cannot assess from the outside what that did to the seal
PMC12313605 Fenwick S, et al
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A credible COA should include HPLC purity above 98%, mass spectrometry confirmation of the correct molecular weight for the specified salt or free acid form, endotoxin testing documented, and heavy metal screening, all from a named third-party ISO-accredited lab
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