b12 injections affect periods Heavy Vitamin B12 Deficiency and HbA1c: How
Description
Do not massage the site vigorously

Multiple compounds targeting the same pathways may cause excessive stimulation or unpredictable interactions
Consider regular oral supplementation if you have a limited dietary intake of B 12 or are taking medications that interfere with B 12 absorption

A peptide that maintains its activity for days rather than minutes
Specifically: Outpatient and inpatient laboratory test volumes for B 12 investigations increased from 267,721 to 570,265 between 2013 and 2020
I can't think of any way in which this would happen
