Most people tell me they feel a “buzz” within 24 hours. Not a jittery coffee buzz, but a smoother, “I can do things” vibe. You might also notice better mood—because B12 helps regulate brain chemicals like serotonin. (And a happy you is less likely to stress-eat an entire pizza, am I right?)
But—and this is a big but—don’t expect a miracle on a plate. If you’re eating 4,000 calories a day and never moving, a B12 shot is just an expensive pee. Your body will flush out any excess B12 you don’t need, so more is not better. It’s like trying to fill a leaky bucket with a fire hose.
The Practical Stuff
Shots cost anywhere from $20 to $50 each, and you’ll need a prescription from a doctor (unless you walk into a med spa with looser rules). The typical schedule is one shot per week for a month, then maintenance. And yes, it’s a needle—but it’s tiny, and most people say it stings less than a papercut.
One more side note: B12 shots can be a lifesaver if you genuinely have a deficiency. A simple blood test can tell you. If your levels are fine, save your money for a good pair of walking shoes instead.
How to Lose Weight Using Vitamin B12 Injections | weightaway… | Flickr
