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Vitamin B12 is not typically found in plants, so vegans and vegetarians may need to look for fortified breakfast cereals that include B12 or opt for a regular supplement (NIH, 2020)

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This is more a contamination concern than a degradation concern, and it primarily affects compounded vials that have been at room temperature for extended periods

Biosens (Basel) 15:31 Yao J, Yang M, Duan Y (2014) Chemistry, biology, and medicine of fluorescent nanomaterials and related systems: new insights into biosensing, bioimaging, genomics, diagnostics, and therapy

Sterile water Sterile water is purified and free of microorganisms at the point of manufacture, but contains no preservative