Older people and people with digestive tract conditions are most at-risk for developing vitamin B12 deficiencies
Injections bypass the gut, so they are the better route for malabsorption, while oral B12 can be enough for mild low intake
Once reconstituted in bacteriostatic water or sterile saline, most peptides remain stable for 2 to 6 weeks when refrigerated at 28 C
Vidal-Alaball J, Butler CC, Potter CC: Comparing costs of intramuscular and oral vitamin B12 administration in primary care: a cost-minimization analysis
I also take medicines that make me a little shaky, so drawing out medicines is not ideal, she said
If any signs of injection site infection develop (increasing redness, warmth, swelling, or pain), discontinue use and consult a healthcare provider