can b12 injections give you diarrhea Vitamin deficiency Guide: Causes, Symptoms and Treatment Options Vitamin B12 Injections: Ideal Dosage

The peptide does not suppress appetite

You can certainly combine the shots in the same syringe, but I do not recommend it (unless you are an expert), because if you get an air bubble in the syringe, as you extract the liquid from the vial, you will need to slowly return the liquid into the vial and re-extract it again till theres no bubbles

Exceeding common ranges without strong scientific justification is generally discouraged in responsible research

Sub q should in theory give close to 100% bioavailability, but we really dont know the one PK study never tested it, so theres no measured number and no dosing conversion behind it

Comparing Effectiveness Across Administration Routes Choosing the best way to get B12 depends on several things