A 27G, 1/2-inch needle on a 1 mL luer-lock syringe is acceptable for peptides that reconstitute in oil-based carriers, though the vast majority of commercial research peptides use aqueous bacteriostatic water and draw easily through 29, 31G bores
Mannitol and carboxymethyl cellulose are common B12 shots additives that you may have reacted to
After reconstitution, follow your institutional SOP for temperature, light exposure, and working-solution stability
This gives you a clear baseline reading and ensures your treatment is genuinely tailored to your actual B12 levels rather than guesswork
In vitro results are a promising starting point, but skin is far more complex than a dish, so they don't automatically translate into visible results on your face
How often you should get glutathione IV therapy varies based on your individual goals