Moreover, certain medications commonly prescribed to older individuals, such as metformin and proton pump inhibitors, may hinder B12 absorption
Mild soreness or redness at the site is normal
For the injection technique side of your protocol, our companion guide on how to inject peptides subcutaneously covers syringe selection, injection sites, the 8-step technique, and the most common errors patients make in the first weeks of self-administration at Perfect B in Doral
Instead, a pantry or medicine cabinet in a climate-controlled area is a better choice
Pharmacokinetic characteristics Absorption and distribution 30 minutes after intramuscular injection, the peak blood concentration of the drug is reached, with a bioavailability of 82% to 88%
(2020) Comparison of sublingual and intramuscular administration of vitamin B12 for the treatment of vitamin B12 deficiency in children