what happens if you inject vitamin b12 into a vein Injections How to Give Yourself a

Deficiency can cause megaloblastic anaemia

Int J Geriatr Psychiatry

When the deficiency becomes chronic, it may lead to more serious problems such as depression, cognitive decline, or balance issues

Researchers comparing this page should review whether the listed supplier publishes COAs from recognizable laboratories, whether the product page shows the same vial size they need, whether the advertised price is before or after a discount, and whether the vendor clearly separates research-use products from any clinical or telehealth offering

Practical resources and next steps Want to learn more about research-backed approaches