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Doctor insights on: High B12 Levels And Cancer

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I'm taking 5000 mcg of B12. Since beginning this my serum level went from 500 to >2000, is the supplement the cause? Read high levels can be cancer!!!

I'm taking 5000 mcg of B12. Since beginning this my serum level went from 500 to >2000, is the supplement the cause? Read high levels can be cancer!!!

Explanation: Yes, your serum level increased due to supplement., and you need to discuss the dosage of B12 with your doctor. This is NOT the sign of cancer!!! ...Read more

Dr. Barry Rosen
4,351 Doctors shared insights

Cancer (Definition)

Cancer is a group of diseases that is characterized by uncontrolled cell growth leading to invasion of surrounding tissues that spread to other parts of the body. Cancer can begin anywhere in the body and is usually related to one or more genetic mutations that allow normal cells to become malignant by interfering with internal cellular control mechanisms, such as programmed cell death or by preventing ...Read more


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Hi, I had my blood test results back and my B12 vitamins are slightly high, it was 947 ng/l. Does this mean I have a cancer risk. Should I be worrried?

Hi, I had my blood test results back and my B12 vitamins are slightly high, it was 947 ng/l. Does this mean I have a cancer risk. Should I be worrried?

You're OK: I like my patients to keep their B12 levels in your range. If that was the only "abnormality" on your test, you'll be fine. ...Read more

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Can using B12 injections for a long time cause cancer? I like B12 injection which is done by a woman nurse. I'm on it since 4 years. Is it dangerous?

Can using B12 injections for a long time cause cancer? I like B12 injection which is done by a woman nurse. I'm on it since 4 years. Is it dangerous?

NO but why use it???: Indiscriminate use of B12 injections is ill advised. Unless you have a medical reason (? deficiency) I would advise you to stop it before you create a new problem...No injections are entirely safe. ...Read more

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Can having a B12 deficiency cause cancer?

Can having a B12 deficiency cause cancer?

No: Vit B12 deficiency does not cause cancer.
But one can have both cancer and vit B12 deficiency diganosis in the same time ...Read more

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My neorologist gave me some blood tests and my b12 came back with the result of 1243 and Mma at 74. Should I be concerned with cancer? I've had thyca

My neorologist gave me some blood tests and my b12 came back with the result of 1243 and Mma at 74. Should I be concerned with cancer? I've had thyca

You're fine: High B12 never means anything nowadays. There are a few uncommon, obvious diseases in which it tends to be high. I am going to assume your units on methylmalonic acid suggest a high value and that also means nothing. Reference ranges are set so that a few percent of healthies fall outside on either end. Be glad for good health. ...Read more

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Is B12 deficiency caused by cervical cancer?

Usually Not: Here is a good review on cervical cancer

http://www. Cancer. Net/cancer-types/cervical-cancer. ...Read more

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Could an early stage small cell lung cancer cause vitamin deficiencies? Thinking around B12, D, K, E.

Could an early stage small cell lung cancer cause vitamin deficiencies? Thinking around B12, D, K, E.

You are way out!: You have a load of anxiety without any good reason. Just relax and forget that you have cancer. If you had the cancer, it will not remain hidden. But you will go insane thinking about it and worrying about it. I suggest that you adopt a good hobby like a long morning walk daily and get your mind off the subject of Cancer. ...Read more

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I'm 50 year old female 9 year breast cancer survivor. I'm cancer free. My Dr wants me on a good vitimen I bought alive it's b12 is 100 mcg.

I'm 50 year old female 9 year breast cancer survivor. I'm cancer free. My Dr wants me on a good vitimen I bought alive it's b12 is 100 mcg.

No effect: Without a family history of breast cancer the chance is high that you are cured of your cancer. This has not been due to the influence of any vitamin. Cause is environmental with a high possibility due to MMTV with or without EBV. Incidence of breast cancer recurring is 1% per year for 15 yrs Yearly exam still important. Any multi vitamin will do but have no effect on your disease. ...Read more

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Hi I have vitamin B12 Deficiency. Doc didn't say pernicious anemia. Everyone said I'm going to get cancers. God im so scared. I've started injections?

Hi I have vitamin B12 Deficiency. Doc didn't say pernicious anemia. Everyone said I'm going to get cancers. God im so scared. I've started injections?

B12 def: Are you vegetarian or vegan, they have B12 issues at times because B12 sources are animal. May also be ileitis or intestinal issues where B12 is absorbed (if not pernicious anemia) or dietary/ age. If you are on injections and you level are adequate (I like above 400) I would not be concerned, don't worry ...Read more

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Could metabolic activty from early small cell lung cancer cause vitamin deficincies (B12, D, Zinc, follate)? &Would this earlry tumor show on CT?

Could metabolic activty from early small cell lung cancer cause vitamin deficincies (B12, D, Zinc, follate)? &Would this earlry tumor show on CT?

No; but poor diet ca: Vitamin deficiencies (more than 1) like those of which you speak come from a poor diet that often includes alcohol or cigarettes. All of those can, in turn, cause small cell lung cancer but not necessarily. Cancer patients often eat poorly, but there are other reasons (liver disease, heart failure, kidney disease) which can do the same thing. Go to your doctor, get checked out. ...Read more

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Why would I have high B12 levels in my blood?

High intake: Since vitamins, by definition, are substances that we cannot make ourselves, a high level can only come from high intake. Vitamin B12 is not very toxic, but in high amounts can cause diarrhea, edema and increase risk of clots. If you are taking a vitamin B12 supplement, or injections you may want to cut back (discuss with your doctor if you are taking under a doctor's supervision). ...Read more

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In my last blood test, I have high levels of B12 (950mg). What this mean?

In my last blood test, I have high levels of B12 (950mg). What this mean?

There is no: Consequence of an elevated B12 level. It is a water soluble vitamin. ...Read more

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I have high levels of B12 and do not take supplements. Should I be concerned!

I have high levels of B12 and do not take supplements. Should I be concerned!

No.: Vitamins are usually available in fresh vegetables and Fruits. High Vit B12 is good. No need to take extra supplement. ...Read more

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My B12 level is high 980. What's the cause?

My B12 level is high 980. What's the cause?

Supplement too high: High B12 level can be related to taking too much B12 supplements; most of time excess is excreted because being water soluble vitamin. In rare cases, excess B12 supplementation may cause numbness or tingling in the arm, hands and face.
Excess vitamin B12 may contribute to anxiety symptoms, panic attacks, insomnia, worsen hyperthyroidism, rashes. ...Read more

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Is a blood B12 level of 1400 too high?

Is a blood B12 level of 1400 too high?

No: It is higher than the lab reference range, but it is fine and nothing to worry about. ...Read more

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What does a high level of vitamin B12 do to me?

Nothing.: None toxic and will simply be urinated out, after your body's stores are filled. I take 2500mcg/day! For years! ...Read more

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Can dehydration cause high levels of B12 in blood?

Can dehydration cause high levels of B12 in blood?

No: Chronic myelogeneous leukemia, promyelocytic leukemia, polycythemia vera and also the hypereosinophilic syndrome can result in elevated levels of B12 mostly from increased production of haptocorrin.
In addition, because the liver stores b12, liver diseases such as acute hepatitis, cirrhosis, hepatocellular carcinoma and metastatic liver disease can also cause a rise in serum b12. ...Read more

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I have low B12 levels and high red cell count. What does this mean?

I have low B12 levels and high red cell count. What does this mean?

Have you seen?: Have you seen a hematologist? Increased red cell count can be primary (bone marrow problem) or secondary (many possibilities, including smoking for example). Low B12 can be very serious. Get folate (folic acid) on board first then begin B12 replacement. Sounds like you need to seek help from experienced md. Perhaps a hematologist. ...Read more

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Red cells large 5 yrs after correction of B12 def. With high erythroproiten level. Further testing?

Yes: There are many things that can cause elevated red blood cell size-besides vit B12 deficiency. To name some of them will include thyroid problems, other deficiency, bone marrow failure, liver problems, drugs related, breaking down of red blood cells etc. Yes, you should have work-up done. Please go to see your doctor and get yourself checked. ...Read more

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I have to be concerned because my B12 level are high, and I don't take any vitamin or B12 suplements?

I have to be concerned because my B12 level are high, and I don't take any vitamin or B12 suplements?

Might be serious: I am sorry to tell you that high B12 levels can be a sign of serious health problems including liver ; kidney disease, myelproliferative disorders including leukemia ; polycythemia vera ; hypereosinophilic syndrome. High intake of B12 does not cause these. It is important for you to be evaluated to find the underlying cause. See http://healthyeating. Sfgate. Com/high-vitamin-b12-mean-9057.Html. ...Read more

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My b12 levels are always 1200-1300 and my alanine levels are high. Does it neccesarily mean something is wrong with the liver?

Maybe: Elevated B12 means nothing. You're making more of the binder protein for some reason. Nobody measures alanine, but if your alanine amino transferase (ALT / SGPT) levels are up, you'll want to know why -- if it's not alcohol, you may have a medication allergy, a viral hepatitis, iron overload, Wilson's, autoimmune hepatitis, or it may be your body's way of asking for more exercise. ...Read more

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What would it point to if urine homocysteine levels are high and chronic high b12 levels for years? Blood homocysteine is normal.

Means nothing: This pathologist thinks the whole homocysteine business is a fad driven by fear of liability. Nobody knows what to do with the data, beyond advising healthy lifestyles. High B12 reflects the fact that you make mirror the binder protein than other folks. It's you. Stay physically fit and be thankful for good health. ...Read more

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Neutrophils 39 (40-74), neutrophils (absolute) 1.3 (1.4-7), high lymphs 50 (14-46), iron sat. 13 (15-55), B12 1962! other levels normal. Causes?

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. Having said that, you do seem to have iron deficiency, other values are not far from normal. Please consult with your doctor. You may take over the counter iron supplements. ...Read more

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For the last year my B12 levels are always high on test, recent labs show 1333 & I take no B12 supplements. What can cause this? I feel horrible.

Why Yur checking it?: This is a test only done if you have anemia, in that situation we look for a low value. A B12 level has some significance but only if your blood counts (cbc) is abnormal. So tell us the results of your complete blood count (cbc); then we can guide you further. It is unlikely it has any health implications. Tell us why you feel horrible? Are you worried about these results or something else? ...Read more

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What causes extremely high serum vit B12 levels? Mine was 11, 500! (Max is 900). 2 years ago my levels were low, 158. Dr referring me to hematologist.

Supplements?: On its own elevated B12 is not very meaningful and might just be a result of vitamin supplements. Some kinds of leukemia and liver disease can cause high levels but these are easily picked up on blood tests. If you are taking vitamin supplements, I'd lay off those and recheck the B12 in a month. ...Read more

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What causes high vitamin B12 levels?

Intake + Absorption: Vitamin b12, aka cyanocobalamin, is common in a huge variety of foods; low intake rare. However, none of us absorb B12 directly. Instead, the cells of the upper ⅔ of the stomach which secrete hydrochloric, hcl, acid also produce & secrete a protein, called intrinsic-factor, which binds b12. The small intestines absorb intrinsic-factor with whatever B12 is bound, & the B12 is thereby also absorbed. ...Read more

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My B12 level is 962 and my dodctor says this is high. Can this be bad for me?

Is normal...: Unless the lab "normals" (at the lab that ran your bloodwork) is atypical, the level of 962 is considered normal and warrants no concern on your part. B12 deficiency causes anemia, glossitis (tongue inflammation), paresthesias (abnormal sensation), ataxia (lack of muscle coordination). B12 excess is described in animal models and with IV over-feedings but does not constitute disease. ...Read more

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Can cancer cause high cortisol levels?

Can cancer cause high cortisol levels?

Yes: A spot elevated cortisol means nothing. Appropriate follow-up is a Dexamethasone suppression test, 24 hour urinary cortisol, maybe others if cushingism is a possibility, then a workup for the possible causes, one of which is an adrenal cancer. If you suspect you have cancer, there are better ways of looking for it; I'm glad you had your colonoscopy. Best wishes. ...Read more

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Could high prolactin levels cause cancer?

Could high prolactin levels cause cancer?

Prolactin and cancer: It may be produced by a tumor or a cancer but a high prolactin level isn't likely to cause a cancer. Still, in women with very high levels who don't have regular menstrual cycles, the endometrial tissue can become abnormal. ...Read more

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Is it possible for you to have high levels of alp and not cancer?

Is it possible for you to have high levels of alp and not cancer?

? alp?: Abbreviations are misleading at best. I assume you imply alk phosphatase=alp?
If that is what you mean, then it does no t mean cancer as it is a non specific enzyme which can go up for many liver ailments or from bone disease also.
Good luck. ...Read more

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If cancer was to cause elevated ferritin levels, how high would the levels get?

If cancer was to cause elevated ferritin levels, how high would the levels get?

Depends: It depends on the type of cancer. The highest levels are seen in an uncommon entity called hemophagocytic lymphohistiocytosis. You may consult this site for more information on this entity.

http://www. Hopkinsmedicine. Org/healthlibrary/conditions/hematology_and_blood_disorders/hemophagocytic_lymphohistiocystosis_134, 212/ ...Read more

Dr. Randy Baker
1,013 Doctors shared insights

Vitamin B12 (Definition)

Vitamin B12 is a vitamin which is a kind of nutritional agent ...Read more