Both scenarios are valid depending on the underlying health context
Researchers are responsible for ensuring proper handling, storage, and disposal in accordance with institutional, federal, and international guidelines
For example, hydroxocobalamin lasts longer, so its given less often
Performance: Dissolves gum, varnish, and other fuel deposits
There is no reason to worry about cyanide in vitamin B12 supplements, but there is reason to worry about self-styled pseudoexperts with a sketchy understanding of science alarming the public, usually with an eye towards monetary gain in some fashion.
You can find it in foods like eggs, dairy, and meat