is taking vitamin b12 nasally and by injection dangerous (IM/nasal) B12 Nasal Spray vs Injection:

There was no known history of diabetes, thyroid disorders, renal or liver disease, or recent infections

Anesthesia: Used before surgery to reduce saliva and respiratory or gastric secretions, and during procedures to block cardiac vagal reflexes and manage drug-induced arrhythmias

These treatments are fast-acting, highly absorbable, and require no downtime

The compound has become one of the most recognised peptides within modern research literature due to its defined molecular structure, reproducible analytical profile and extensive use in experimental peptide investigations

Results vary and depend on diet, exercise, and individual metabolic factors

The duration of the effects can vary based on the individual and the condition being treated