Vitamin B-12 deficiency can be a concern for people on a total vegetarian diet. There are a lot of theories and information about B-12, but what is the truth about B-12? This lecture will answer your questions with scientifically supported information about vitamin B-12. You will learn about how B-12 interacts with your physiology, how much B-12 you need, and where you can get it. Get answers here and stop wondering about vitamin B-12.