What are the symptoms of high B12 levels?

High doses of vitamin B-12, such as those used to treat a deficiency, might cause:
  • Headache.
  • Nausea and vomiting.
  • Diarrhea.
  • Fatigue or weakness.
  • Tingling sensation in hands and feet.

Takedown request   |   View complete answer on mayoclinic.org

How do you feel when your B12 is high?

In some people, high levels of B12 may cause gastrointestinal problems such as bloating and diarrhea. And if you have high blood pressure or poor cardiovascular health, having too much B12 may further complicate these issues. Pregnant and breastfeeding women may also need to be especially mindful of B12 levels.

Takedown request   |   View complete answer on phlabs.com

Should I be worried if my B12 is high?

Excess B12 is either stored in the liver, present in the blood without any adverse effects, or excreted. There are no studies investigating the potential clinical effects of high B12 because, in general, there are no known adverse effects caused by elevated B12.

Takedown request   |   View complete answer on ncbi.nlm.nih.gov

What does it mean if your B12 is too high?

An abnormally high vitamin B-12 status can be an early sign of liver disease, diabetes, or certain types of leukemia. A doctor may use the results of a vitamin B-12 test to help form their diagnosis.

Takedown request   |   View complete answer on medicalnewstoday.com

What cancers cause high B12?

Other studies focusing on specific cancers have shown a strong association between elevated B12 levels and liver cancers (OR 3.3 [95%CI: 1.1–10.4] for hepatocellular carcinomas and OR 4.7 [95%CI: 1.2–17.9] for other liver cancers) [16], a moderate association with prostate cancer (OR 1.1 [95%CI: 1.0–1.2]) [17], and no ...

Takedown request   |   View complete answer on ncbi.nlm.nih.gov

What are the Side Effects of Over Dosage of Vitamin B Overdose? | Vitamin B Overdose | Vitamin B12

16 related questions found

How do you get rid of excess B12?

Vitamin B12 is a water-soluble vitamin, and the risks of dose-related side effects are low. Your body can usually get rid of excess vitamin B12 through your urine. In rare cases, high doses of vitamin B12 injections have been associated with skin reactions.

Takedown request   |   View complete answer on goodrx.com

How can I lower my B12 levels?

Research has suggested that the consumption of alcohol may reduce vitamin B12 levels. An older study indicated that moderate alcohol intake diminished vitamin B12 by 5% among “healthy, well-nourished, postmenopausal women.”

Takedown request   |   View complete answer on medicalnewstoday.com

What foods to avoid if B12 is high?

Reduce the amount of animal-derived foods that appear in your diet, as they contain vitamin B12. These include meat, poultry, dairy and shellfish.

Takedown request   |   View complete answer on livestrong.com

How long does it take for vitamin B12 to get out of your system?

Unlike most other vitamins, B12 is stored in substantial amounts, mainly in the liver, until it is needed by the body. If a person stops consuming the vitamin, the body's stores of this vitamin usually take about 3 to 5 years to exhaust.

Takedown request   |   View complete answer on merckmanuals.com

Can high B12 be toxic?

Is taking high doses of B12 helpful or harmful? Since B12 is a water-soluble vitamin, it's generally considered safe, even at high doses. No Tolerable Upper Intake Level (UL) has been established for B12, due to its low level of toxicity.

Takedown request   |   View complete answer on healthline.com

What foods causes B12 to be high?

It's found in large amounts in animal products, fortified foods, and dietary supplements. Some of the richest sources are liver, beef, sardines, clams, and dairy products. Whether you want to increase your vitamin stores or prevent deficiency, eating these foods may considerably improve your overall health.

Takedown request   |   View complete answer on healthline.com

Can stress cause high B12 levels?

Stress is known to deplete our levels of B vitamins, especially vitamin B12. Vegetarians, vegans and those on restricted diets can struggle to get enough vitamin B12 to meet their body's needs.

Takedown request   |   View complete answer on whitworthchemists.co.uk

Does your body flush out extra B12?

The body will typically excrete excess vitamin B-12 that a person gets from the diet or via supplements. The body does not absorb vitamin B-12 supplements very effectively. This means that even if a person takes very high amounts of vitamin B-12, their body still does not absorb a significant amount.

Takedown request   |   View complete answer on medicalnewstoday.com

Does B12 affect liver function?

This new study hints that two nutrients, folate and vitamin B12, might be especially beneficial to help support liver health and potentially reverse nonalcoholic fatty liver disease.

Takedown request   |   View complete answer on eatingwell.com

Can B12 cause neuropathy?

B12 deficiency may cause demyelination of nerves in the peripheral and central nervous system13 and has been associated with peripheral neuropathy, loss of sensation in peripheral nerves, and weakness in lower extremities in older adults1, 1416.

Takedown request   |   View complete answer on ncbi.nlm.nih.gov

Is B12 a tumor marker?

Our study is in comply with studies indicating that vitamin B12 can be used as tumor marker as in our study indicates that vitamin B12 is significantly high for the patients with HCC compared to control group and patients with cirrhosis.

Takedown request   |   View complete answer on jag.journalagent.com

What autoimmune diseases cause high B12 levels?

Significantly Elevated Vitamin B12 Levels in Autoimmune Lymphoproliferative Syndrome (ALPS), a Rare Lymphoproliferative Disorder with Apoptosis Defect | Blood | American Society of Hematology.

Takedown request   |   View complete answer on ashpublications.org

Does high B12 mean diabetes?

Reportedly, patients with diabetes have higher serum vitamin B12 levels than those with normal glycemic control, and fructosamine levels are significantly correlated with serum vitamin B12 levels in patients with DM,8 which suggests that serum vitamin B12 levels may be associated with glycemic control in T2DM.

Takedown request   |   View complete answer on journals.sagepub.com

Why would B12 be high without supplements?

High or supraphysiological serum B12 levels without supplementation have been associated with many pathological conditions including renal failure, haematological disorders, cancer, and hepatic or autoimmune diseases. All conditions may show elevated concentrations of B12 transport proteins.

Takedown request   |   View complete answer on academic.oup.com

What level of B12 causes neurological symptoms?

Patients with neurological symptoms, serum B12 level lower than 200 pg/mL, and with normal folic acid levels were included in the study.

Takedown request   |   View complete answer on ncbi.nlm.nih.gov

What causes high B12 in elderly?

Elevated cobalamin levels often accompany diseases such as leukemia, myeloproliferative disorders, hypereosinophilic syndrome, and metastatic cancer—especially when involving the liver.

Takedown request   |   View complete answer on agsjournals.onlinelibrary.wiley.com

What foods to avoid if B12 is high?

Reduce the amount of animal-derived foods that appear in your diet, as they contain vitamin B12. These include meat, poultry, dairy and shellfish.

Takedown request   |   View complete answer on livestrong.com

Can high B12 cause nerve pain?

Symptoms of neuropathy usually stop when the supplements are discontinued. High-dose vitamin B supplements should be avoided, because they can lead to nerve damage.

Takedown request   |   View complete answer on healthyeating.sfgate.com

How long does it take for B12 to leave your system?

Unlike most other vitamins, B12 is stored in substantial amounts, mainly in the liver, until it is needed by the body. If a person stops consuming the vitamin, the body's stores of this vitamin usually take about 3 to 5 years to exhaust.

Takedown request   |   View complete answer on merckmanuals.com

Can too much B12 cause tingling?

In rare cases, people who take high doses of vitamin B for a long period of time may experience extreme numbness or a tingling sensation. In some patients, tingling sensation is experienced mostly in the right side of the body. This symptom is one of the early warning indicators of Vitamin B12 overdose.

Takedown request   |   View complete answer on medicoverhospitals.in