Freeze-thaw cycling is especially destructive to peptides each cycle forms ice crystals that physically shear the molecule, so even one accidental freeze can tank a vial
The storage and absorption characteristics of vitamin B12 differentiate it from other Vitamin B vitamins, which are water-soluble and require regular replenishment in the diet
However, drawing up medication takes longer, and these needles bend more easily
Manufacturing standards stated by the company
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Some medications that may interfere include metformin, PPIs, chloramphenicol, some antibiotics, and anticonvulsants