A 60-year-old male asked:
Disclaimer

last blood test indicates high b12 level of 1957 .the range is 211-911. have taken b12 supplemental for years is this harmful to liver & kidney?

1 doctor answer
Dr. Su Fairchild
23 years experience Integrative Medicine
Safe: Ideal serum B12 levels are 800 or more. B12 is not toxic. Your levels are fine (I have seen higher).
Answered on Jan 3, 2016
1
1 thank

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more. Get help now:

Ask doctors free
Personalized answers
Free
Talk to a doctor
Unlimited visits
$10/month

Related questions:

A 30-year-old male asked:
Dr. J. Lawrence Dohan
56 years experience Dermatology
Yes: No harm from high b12. If hematocrit is 46 you are not anemic.
1
1 thank
A female asked:
Dr. Ed Friedlander
43 years experience Pathology
It's just you: This test itself is not mainstream. It is experimental. A high value on a B12 is never a clinical concern. Reference ranges at real labs are set so th ... Read More
1
1 thank
A 33-year-old male asked:
Dr. Gurmukh Singh
48 years experience Pathology
See below: All laboratory results need to be interpreted in the clinical context and the doctor who ordered the tests is usually in the best position to do that. ... Read More
A 30-year-old male asked:
Dr. Edgar Mendizabal
54 years experience Internal Medicine
Supplements?: Are you taking supplements? If so, decrease the amount and repeat level. On the other hand, B12 vitamin will not harm you.
2
2 thanks

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more. Get help now:

Ask doctors free
Personalized answers
Free
Talk to a doctor
Unlimited visits
$10/month