Quick Answer: How Is B12 Measured?

What is the normal level for B12?

But a normal level of vitamin B12 in your bloodstream is generally between 190 and 950 picograms per milliliter (pg/mL). Between 200 to 300 pg/mL is considered borderline and your doctor may do more testing. Below 200 pg/mL is low and more testing is needed.

How do you test for B12 deficiency?

Here are 9 signs and symptoms of a true vitamin B12 deficiency.

  1. Pale or Jaundiced Skin.
  2. Weakness and Fatigue.
  3. Sensations of Pins and Needles.
  4. Changes to Mobility.
  5. Glossitis and Mouth Ulcers.
  6. Breathlessness and Dizziness.
  7. Disturbed Vision.
  8. Mood Changes.

Is 400 a low B12 level?

Patients with serum vitamin B12 levels between 150 and 400 ng/L are considered borderline and should be evaluated further by functional tests for vitamin B12 deficiency.

Should I be worried if my B12 is high?

Though daily high doses of B12 are unlikely to cause harm in most people, extremely high doses should be avoided unless prescribed by a healthcare professional. If you think you may be deficient in B12, speak with your doctor, who can recommend an appropriate treatment based on your level of deficiency.

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Is 500 a good B12 level?

The vitamin B12 standard reference range is 200–700 pg/ml whereas the proposed optimal range is 500–1300 pg/ml [10]. Higher vitamin B12 ranges have been associated with increased cognitive function, and reflexes, decreased brain atrophy, confusion, weakness and depression [10].

What happens if your body is low on B12?

Not having enough B12 can lead to anemia, which means your body does not have enough red blood cells to do the job. This can make you feel weak and tired. Vitamin B12 deficiency can cause damage to your nerves and can affect memory and thinking.

What does a B12 deficiency tongue look like?

B12 deficiency will also make the tongue sore and beefy-red in color. Glossitis, by causing swelling of the tongue, may also cause the tongue to appear smooth.

What are the symptoms of low B12?

Symptoms of vitamin B12 deficiency

  • a pale yellow tinge to your skin.
  • a sore and red tongue (glossitis)
  • mouth ulcers.
  • pins and needles (paraesthesia)
  • changes in the way that you walk and move around.
  • disturbed vision.
  • irritability.
  • depression.

How long does it take to recover from B12 deficiency?

Recovery from vitamin B12 deficiency takes time and you may not experience any improvement during the first few months of treatment. Improvement may be gradual and may continue for up to six to 12 months.

What level of B12 is considered low?

Values of less than 160 pg/mL (118 pmol/L) are a possible sign of a vitamin B12 deficiency. People with this deficiency are likely to have or develop symptoms. Older adults with a vitamin B12 level less than 100 pg/mL (74 pmol/L) may also have symptoms.

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How long does it take to develop B12 deficiency?

Anemia may not develop until 3 to 5 years after the deficiency begins because a large amount of vitamin B12 is stored in the liver.

Can I take B12 twice a day?

Early research suggests that taking twice the recommended daily allowance of vitamin B12, with or without folic acid, does not reduce the risk of diarrhea in children.

Is B12 level of 1000 too high?

Previous studies have chosen a variety of levels to represent high or very high B12 (pmol/l) levels. Some examples include: 664.219; 5131; 700 (high) and 1500 (very high)11; and 601 (high) and 1000 (very high)10. Excess B12 is either stored in the liver, present in the blood without any adverse effects, or excreted.

What causes B12 to be high?

The most common cause of high B12 in the blood is due to recent ingestion or injection of supplemental vitamin B12. We don’t worry about overdosing on B12 supplements because excess can be excreted in your urine. It could also be possibly from your diet if high in animal products such as meat, eggs, and shellfish.

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