b12 injection vs sublingual injections treatment The pitch is almost always wrong. The mucosa under your tongue injectable b12 shoppers drug mart

It is administered either intramuscularly or subcutaneously

Areas Without Adequate Human Evidence Cardiovascular safety Neurological and psychiatric effects Liver and kidney safety Effects on blood glucose in humans Effects on methylation pathways Genotoxicity Carcinogenicity Reproductive and developmental toxicity Use during pregnancy or breastfeeding Interactions with prescription medicines Interactions with supplements or research compounds Long-term exposure Product-Quality Risks Incorrect quinolinium compound Wrong substitution position Incorrect counterion Incorrect active-content calculation Residual starting materials Residual solvents Degradation products Heavy-metal or inorganic contamination Mismatched certificate of analysis Uncontrolled storage and transport Absence of published harm is not proof of safety A compound without routine regulated human exposure may generate very few formal safety reports simply because there is no organised pharmacovigilance system

10.1021/acs.jmedchem.9b00413 35 GerberP

Compounded semaglutide with B12 is not FDA-approved, but is made by licensed compounding pharmacies under the supervision of healthcare professionals

doi:10.1001/archinternmed.2008.574