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Signs of High Level of Vitamin B12 in the Body



Signs of High Level of Vitamin B12 in the Body

Vitamin B12, also known as Cobalamin, has an indispensable role in our body, such as taking part in the synthesis of red blood cells and formation of DNA and also regulating nerve cells which helps our nervous system to work smoothly and effectively.

Sources of VitaminB12 

Several foods are rich in vitamin B12 and should be added to our regular diets; meats, poultry, egg, fish, dairy, etc., are some examples of Vitamin b12 rich sources. Vitamin B12 is also added to foods, for instance, fortified breakfasts like cereals, and is easily available as oral supplements. Those people with deficiency of B12 are prescribed to take Vitamin B12 injections and nasal spray.

How much to get Vitamin B12 per day?

You should consume vitamin b12 according to recommended dietary allowances (RDAs). RDAs suggested values can fulfill your body’s needs.

  • Infants-6months: 0.4 mcg
  • Babies (7-12 months): 0.5 mcg
  • Kids (1-3 years): 0.9 mcg
  • Children (4-8 years): 1.2mcg
  • Children (9-13 years): 1.8 mcg
  • Adults (13 to onwards): 2.4 mcg

If you’re on medications, you need to consult your doctor, who will decide whether you take vitamin b12 supplements or not; if yes, then how much you can get. Because it’s possible supplements can interact with medicines that may negatively impact you. Your doctor will be able to tell you is it ok to take 1000 mcg of vitamin B12 a day depending on your personal requirements.

Vitamin B12 level test

Vitamin B12 level test checks for the amount of Vitamin B12 present in the blood or urine to calculate the body’s overall B12 level.

While person having a level of Vitamin B12 outside the normal range will need proper treatment.

Vitamin b12 low level in the body causes neurological diseases like memory loss, fatigue, and weight loss. High Vitamin B12 indicates some liver diseases, diabetes, or other conditions.

What are low and high levels of Vitamin B12

Low levels

If Vitamin b12 levels are below 200pg/mL, it is considered low levels, indicating deficiency of Vitamin B12.

High levels

If Vitamin B12 is below 900pg/mL, it is said to be high. Results like these suggest liver and kidney problems and may also be associated with leukemia. When intakeit’s the right doses, vitamin B-12 supplements are generally recognized as safe. While you take heavy doses of vitamin b12 than recommended, that adversely affects your body. The human body absorbs only as much as it requires, and an excessive amount passes through your urine.

Higher 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

Treatment for high vitamin B12 levels

There is no upper limit for b12 vitamin intake because taking high levels does not cause problems. However, it’s too much high level can be a cause for concern, as it suggests a severe underlying condition. Doctors will treat the underlying medical condition rather than the elevated levels of vitamin B-12.


A level of vitamin B12 above 900 pg/mL is considered a high level; there are no such significant side effects related to this, but the person having high doses of vitamin B12 may observe some acute signs and symptoms like headache, and vomiting, etc.


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