is b12 injections safe at Home - Safety Guide for Self-Administration B12 Injection Dose for Adults:

Recovery considerations Recovery takes longer during caloric restriction

Second, and more critically, the expansion of water as it freezes can create immense pressure inside the vial, potentially causing micro-fractures in the glass or compromising the seal of the rubber stopper

Combining B12 Injections with Other Treatments At The Derm Spa, we often recommend combining B12 injections with other wellness treatments for comprehensive health benefits: IV Vitamin Therapy: For a more extensive nutrient boost

however, pregnant and breastfeeding women must speak with their doctor before they begin any injectable vitamin

But, drugs like chloramphenicol might interact with it