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The average peak concentration of B 12 obtained after baseline correction following administration of intranasal spray was 757.96 +/- 532.17 pg/mL
in the end, the choice is probably better made on other factors (and we price it that way on purpose - because we feel you shouldnt have to sacrifice on choosing the right technology just because its less expensive)
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Always inform your healthcare professional about planned lab testing, as recent vitamin injections can influence certain results
Another recommends 500mcg
doi: 10.1016/j.jpba.2014.06.012
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