Update: Our readers suffer from pernicious anemia and need lifelong B12 shots, so we partnered up with a lab in the UK to offer vials of medical-grade methylcobalamin for $129 or less, which can bring the cost per shot down to $3.10-$3.90
The thigh This location is preferable for self-administrated shots
B12 reduces tiredness caused by a lack of it
Before using this medication, speak with your doctor or pharmacist about your medical history, especially of low potassium, gout, blood disorders (polycythemia vera), eye disorders (Lebers disease), or other vitamin or mineral deficiencies
Claimed outcome NAD+ changes Evidence level Cell and animal evidence What research currently shows Blocking NNMT can preserve nicotinamide, a building block used to make NAD+