If you're comparing B12 shots vs pills, the first thing you probably want to know is which one will actually raise your levels

Uses of Hydroxocobalamin Injection Vitamin B12 deficiency Pernicious anemia Megaloblastic anemia Peripheral neuropathy due to B12 deficiency Maintenance therapy in vegans or elderly patients Cyanide poisoning (approved use in emergency medicine) How Does THydroxocobalamin Injection Works Hydroxocobalamin is converted in the body to active coenzyme forms of Vitamin B12, which: Help in red blood cell production Maintain nerve function and myelin sheath Participate in DNA and protein synthesis Act as a cyanide scavenger by binding to cyanide ions and converting them into non-toxic cyanocobalamin , which is excreted in urine Common Side Effects of Hydroxocobalamin Injection Temporary skin redness or itching Mild diarrhea Headache or dizziness Injection site pain or swelling Reddish urine discoloration (harmless) Rare: Hypersensitivity reactions Generally well tolerated

Bundle pricing: multi-month plans are refunded on a prorated basis using the standard non-bundled monthly price, based on shipments already received
2018 Feb;38(1):174-183
If you are mildly B12 deficient but are otherwise in good health, you may be able to raise your B12 levels with a few simple dietary adjustments
Specific peptides, including growth hormone and gonadotropin-releasing hormone, are key regulators of glucose and lipid metabolism, influencing the bodys ability to manage these vital processes