How dangerous is b12 deficiency?

Related questions

1. Can I take 1000 mcg of b12 a day?
2. Do any vegetables have b12?
3. How long does cyanocobalamin stay in your system?
4. Do bananas have b12?
5. Is a b12 level of 300 normal?
6. Is b12 deficiency serious?
7. What is a normal vitamin b12 level for a woman?
8. Is 1000 mcg b12 safe?
9. Is b12 really necessary?
10. What is the use of cyanocobalamin?

Tags

1. #vitamin
2. #memory
3. #problems
4. #affecting
5. #vision
6. #cause
7. #nervous
8. #system
9. #issues
10. #neurological