Should we be concerned about getting too much vitamin B12? The video sources, transcript, and doctor's notes are available at https://see.nf/b12safety This is the last video in a five-part series on vitamin B12. If you missed the previous ones, check out - "How Long Does It Take to Become Vitamin B12-Deficient and What Are the Symptoms?" at https://see.nf/4ng0vUQ - "The Best Way to Test for Vitamin B12 Deficiency" at https://see.nf/4lSQCvb - "The Best Source of Vitamin B12: Supplements, Shots, o