Published descriptions vary slightly in reported length, so for the exact chemical identity check the PubChem entry rather than relying on a single secondary source
When her GP saw the results, she was shocked and told my daughter she had never seen a result for B12 like that
Total content: 10mg (10,000mcg)
Most vials contain 2 mg (2,000 mcg) of DSIP, and if you reconstitute with 2 mL of bacteriostatic water, you get a concentration of 1,000 mcg/mL (or 1 mcg per 0.001 mL)
Seek emergency help for trouble breathing, facial or throat swelling, severe rash, chest tightness, or fainting after an injection
This article is about the other side of the conversation.) The Safety Profile: What Clinical Studies Show Let's start with the reassuring part