where can i get vitamin b12 injections Sandoz Injectable Solution - 1000 mcg/10 mL sheep and swine as needed Do You Need a Prescription
Description
The vial should be kept out of reach of children, as with any medication

Severity of deficiency: if your levels were very low, it may take several doses to fully restore your tissues, or you may feel a dramatic early difference because your body was so depleted

Small molecule nicotinamide N-methyltransferase inhibitor activates senescent muscle stem cells and improves regenerative capacity of aged skeletal muscle

The short answer is: it depends on what symptoms you have and how deficient you are
