how long for vitamin b12 injections to work Does A Shot Last How Quickly Does a B12

Our Story Frequently Asked Questions Your provider will help you determine the best frequency for your B-12 shots depending on your unique health needs, diet, and current vitamin B-12 levels

Many patients start with weekly injections, which can be adjusted over time

How long B12 shots take to work depends on your B12 levels when you receive the injection, but you can expect to see improved energy, mental clarity, sleep, and other benefits anywhere from 12-48 hours after treatment

Duration varies based on your baseline level, diet, sleep, stress, and schedule

While we listed two options above, here are three additional supplements worth considering: NOW Foods Methyl B-12 lozenges: With the option to chew or let them dissolve in your mouth, these lozenges provide 41,667% of the DV for vitamin B12