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Description
Commercial serums offer 12-24 months unopened shelf life with professional preservative systems and 6-12 months post-opening depending on packaging (airless pump best), while DIY serums last only 1-2 weeks refrigerated without professional preservatives

The labs we used to analyse blood samples state a healthy range for active B12 is between 37.5 pmol/L and 188 pmol/L

O'Brien S, Kantarjian H, Estey E, Koller C, Robertson B, Beran M, Andreeff M , Pierce S, Keating M
They make sure that all minutes of care are recorded
