Use 29 to 31 gauge insulin syringes for subcutaneous GHK-Cu injections
A provider-guided plan relies on a known, pharmacy-prepared source and the delivery form best suited to your goals, which removes most of the guesswork
Oral versus intramuscular administration of vitamin B12 for the treatment of patients with vitamin B12 deficiency: a pragmatic, randomised, multicentre, non-inferiority clinical trial undertaken in the primary healthcare setting (Project OB12)
Preventing and Treating Deficiency Vitamin B-12 injections are commonly used to prevent or treat pernicious anemia and B-12 deficiency
For broader questions about how safe these medications are in general, the SELECT trial data, and what the 2024 to 2026 evidence shows on the most-discussed concerns, see our separate guide on whether weight-loss injections are safe