b12 injection needle and syringe The Advantages of Injections Versus Oral Supplements: Shawn Veiseh, M.D.: Family Medicine Vitamin B12 Injections and Weight

The treatment starts with a big dose, then smaller doses are given regularly

You're injecting inactive compound

One user noticed the shift immediately: "My dr tests mine every 3 months now, instead of 6 months." - [deleted] For some, testing is linked directly with treatment plans: "I need to have 6 jabs over 2 weeks and Ive had 3 so far." - No-Hass-401 And in more complicated cases, doctors look for underlying causes, including autoimmune issues: "If worried, ask for the intrinsic factor in a blood test - that will tell you if you need injections." - Difficult-Stick-2040 These tests are typically straightforward, inexpensive, and highly informative - making them an essential part of staying healthy while on Mounjaro

How we reviewed this article: Current Version October 03, 2025 Written By John DiBella Fact-checked By Dr

Its effectiveness isnt just about the vitaminits also about where its injected