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Calibration Diluent: Provides a consistent, contamination-free aqueous base for assay calibration curves and reference standard preparation
Vigorously swab the rubber stoppers on both with an alcohol pad and let them air dry for a moment
Yesinject at a 90-degree angle into pinched skin, rotate sites weekly, let alcohol dry before injecting, and apply light pressure afterward
We use preservative-free methylcobalamin (the most bio-available form)
The 28-day rule is based on contamination risk, not chemical stability, which persists beyond this period
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