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Immediately after withdrawal, store the vial back in its designated spot in the refrigerator
B12 can be found in foods like fish, eggs, meat, and other dairy products
Because this is a small-molecule salt rather than a peptide, the usual peptide precautions about mechanical shear and methionine or tryptophan oxidation do not apply
Journal of Investigative Dermatology (1999) 10
Refrigeration is optional at every stage, and putting the vial in the fridge does not extend that window
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