You may bruise more easily
intramuscular administration of vitamin B12 for the treatment of patients with vitamin B12 deficiency", Drug Delivery And Translational Research
the label specifically warns against epidural/spinal anesthesia and fluid replacement with benzyl-alcohol-containing solutions
Long-Lasting Hydration Boost Unlike topical moisturizers that only provide surface-level hydration, vitamin injections internally hydrate the skin at a deeper level
30mL Bottle ~200 Sprays Research Peptide Blend Research Use Only Research Applications BPC-157 and TB-500 have been investigated in scientific literature involving peptide biology, molecular signaling pathways, protein interactions, peptide chemistry, extracellular matrix research, and controlled laboratory models
But, as mentioned, those studies were much too small to really know whether it is safe