what size syringe is best for b12 injections Needle a Injection: A Simple Guide B12 Injection Dose for Adults:

DONT use the nasal spray within 1 hour of using other nasal decongestants or allergy sprays, as this can wash the medicine away before it absorbs

Higher doses may be considered under clinical supervision for those who decline injections despite malabsorption, though this is an off-label approach

For those who adhere to a vegan or vegetarian diet, supplementation will be necessary

Allow 15 to 20 minutes for the solution to fully stabilize before drawing the first dose

Individuals with risk factors for B12 deficiency including strict vegans, those with gastrointestinal conditions, patients taking long-term metformin or proton pump inhibitors, and older adultsshould discuss screening with their GP, even in the absence of obvious symptoms