what is used for b12 injections Benefits of Optimal Health B12 Shots vs. IV Infusions:
Description
10.1038/s41419-018-0939-5 Cell Death Dis

The frequency of injections may vary depending on individual needs and health conditions

2013;131(5):e1670-1675

Again, no consistent pattern of symptoms is seen, but infants are more prone to permanent damage than adults
