B12 Levels are too high

My b12 blood test levels came back over 2000. I have MS and have been taking b12 supplements for three years. If I stop taking them, will my levels come back down? How long will it take? I have read a ton of scary things on the internet about levels being too high...can you tell me what it really means when they are too high? My Dr. just shrugged it off and told me to stop the supplements.

Comments for B12 Levels are too high

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Levels Too High When Taking Supplements
by: Kerri Knox, RN

When your levels are high when you are taking supplements, this is entirely meaningless and expected. You are wasting your health care dollars, and causing yourself unnecessary grief by testing Vitamin B12 Levels when you are taking Vitamin B12 supplements.

What you are reading on the internet about high vitamin B12 levels is when someone who is NOT taking supplements and they have high levels. This is indicative of a MTHFR Gene Mutation, which is a serious condition that needs to be treated appropriately.

If your levels don't come down, you may want to get tested for MTHFR. However, if you've been taking B12 supplments for 3 years without problems, then it's almost certainly that your levels are high BECAUSE you are taking supplements. This is nothing to worry about, is an entirely expected outcome, and should be ignored.

Kerri Knox RN Immune Health Queen

Kerri Knox, RN- The Immune System Queen
Functional Medicine Practitioner
Immune System
Side Effects

PS: If you appreciate the free help that I give on my site, please consider making your next supplement purchase through my Health Store in order to help keep this site in operation.

high b levels
by: Anonymous

My naturopath told me high levels can be because the B12 is not being utilized in the cells,that it is only in the blood and that you can be deficient despite the high level.There is another test which should be done to be sure.

Yes, it's a genetic test
by: Kerri Knox, RN

Yes, you should get a genetic test. The common problem is a MTHFR Gene Mutation, and you can learn how to get tested for that on the MTHFR page linked above. Which is why I referenced it in my last answer on this thread.

Kerri Knox RN

Kerri Knox, RN- The Immune System Queen
Functional Medicine Practitioner
Immune System
Side Effects

B12 levels above 2000, told to stop taking B12
by: Anonymous

My B12 levels were above 2000, but I'm only taking 400 mcg in a b-complex. I don't have the MTHFR gene, which I've been tested, and my other labs are normal. The B-complex I take are the Methyl B-vitamins.

Are my B12 levels too high?

please read the thread again
by: Kerri Knox, The Immune Queen

Please read the thread. It answers your question already.

Mine are high too but doctor not worried
by: Suzie

Mine is 1300 and I am not taking any suppliments. Normal CBC and my doctor says there is nothing to worry about but, I am frantic! :-(

High levels B12
by: Anonymous

Been taking B12 for 6 months now once a day 1000 mcg. Hot my labs and my levels are at 2000. So should I discontinued taking them this is the first time the have ever been high like this. .

by: Anonymous

My father’s VB12 is more than 2000 pg/ml and my father’s age is 67+ he is totally veg and never take smoke or alcohol..
What should i have to do for my father, I am very afraid coz my relatives told me it is a sign of cancer…..
Please reply as soon as possible…….

Low and High Vitamin B12
by: Kerri Knox

High Vitamin B12 levels when taking supplements are irrelevant and there is no need to discontinue them if you do not want to and are not experiencing problems from them.

High Vitamin B12 levels when you are NOT taking supplements are a different story and almost certainly indicate that you have the MTHFR Gene Mutation

B12 levels too high
by: Anonymous

Thank you for your comments on high vit b12. Mine is high, 1637, but do take 2000 mcg daily. I also read cancer warning and have been nervous all day. Thank you for straightening that out.

MTHFR and High B12
by: Stacey

I have the MTHFR mutation and have been taking a supplement of Folic Acid/B12 for 7 years as prescribed by my hematologist. My primary care doctor wants me to stop taking it because by B12 was over 3000 in my last blood workup. Is that normal, should I push back or should I find a different doctor. I don't want to just quit taking the supplement because my PCP may not have appropriate knowledge of the MTHFR mutation issues. (I've found many doctors aren't even aware of it!!)

High B-12 and Vitamin D
by: Anonymous

I just received my blood test results in yesterday and here they are below. I do not take supplements but am concerned about the High B-12 results. I just came across this website and I want to be prepared when I go to my appointment tomorrow to discuss the results. Can you please tell me what questions and concerns I should address with the Dr.

Total cholesterol- 201
Non HDL cholesterol- 140
HBa1c- 5.8
Glucose- 120
Vitamin B-12- 1507
Vitamin D- 28.0

1999 B12
by: Kim

Just got my my labs back B 12 is 1999 June it was 1029, should I be worried?, I dont take any supplements

High b12 without supplements
by: Kerri Knox, The Immune System Queen

High B12 without supplements indicates likely MTHFR Gene Mutation.

by: Kerri Knox, The Immune System Queen

I don't know if you should be 'worried', I don't think worry is particularly useful. But you likely have the MTHFR Gene Mutation so long as you were not taking Vitamin B12 supplements when the blood test was taken.

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