why do i feel tired after my b12 injection feeling ⚡ Need an energy boost?, Vitamin injections can help support energy Feeling worse after B12 Injection:

It does make a lot of sense that your body will react to suddenly being given what you need, and the long healing process will make you worse before you get better

A mouse metabolises on a faster clock than a human, and a controlled diet in a cage is not a free-living human diet so even the week-numbers above should be read as the shape of a gradual response, not a promise that a human would see anything on the same calendar

Human Chorionic Gonadotropin (HCG) is a hormone made during pregnancy

Most patients starting with normal b12 levels and no significant risk factors do not require supplementation

FAQ What is the difference between Vitamin B12 and iron