Vitamin A Blood Test – Indications, Procedures, Results

What is a vitamin A test called?

• The Beta Carotene (Carotene) test measures levels of Carotene, a fat-soluble nutrient that is a precursor to vitamin A. (Therefore having a beta carotene deficiency may lead to a vitamin A deficiency.)

Is there a blood test to check all vitamin levels?

• A vitamin panel blood test checks the levels of these thirteen essential vitamins to identify any deficiencies and determine if supplements are needed.

Causes of hypervitaminosis A

• Excess amounts of vitamin A are stored in your liver, and it accumulates over time. Most people develop vitamin A toxicity by taking high-dose dietary supplements, possibly due to megavitamin therapy.

What happens if you lack vitamin A?

• Vitamin A deficiency can result from inadequate intake, fat malabsorption, or liver disorders. Deficiency impairs immunity and hematopoiesis and causes rashes and typical ocular effects (eg, xerophthalmia, night blindness). Diagnosis is based on typical ocular findings and low vitamin A levels.

Which disease is caused by a deficiency of vitamin A?

• Night blindness is one of the first signs of vitamin A deficiency. In its more severe forms, vitamin A deficiency contributes to blindness by making the cornea very dry, thus damaging the retina and cornea.

What diseases result from vitamin A deficiency?

Vitamin A deficiency can result from a diet low in vitamin A or an absorption or liver disorder.

What blood level of vitamin A is toxic?

• The reference range for vitamin A is 20-60 mcg/dL, and a toxic level is higher than 60-100 mcg/dL. Obtain a complete blood count (CBC) to rule out leukopenia. Also perform calcium, glucose, and liver function tests (LFTs).

Can I ask my doctor to test my vitamin levels?

• MayoClinic.com notes that a general practitioner has the ability to request blood tests that can assess a wide variety of vitamin deficiencies.

Can too much A vitamin be harmful?

• But routinely getting an overload of vitamins and minerals can hurt you. Too much vitamin C or zinc could cause nausea, diarrhea, and stomach cramps. Too much selenium could lead to hair loss, gastrointestinal upset, fatigue, and mild nerve damage.

Can too much vitamin A cause liver damage?

• Taking high doses of vitamin A supplements can cause liver damage. Combining high doses of vitamin A supplements with other drugs that can damage the liver could increase the risk of liver disease.

How do you fix vitamin A deficiency?

• The treatment for mild forms of vitamin A deficiency includes eating vitamin A-rich foods – eg, liver, beef, oily fish, chicken, eggs, fortified milk, carrots, mangoes, sweet potatoes, and leafy green vegetables.

Where is vitamin A deficiency most common?

• Vitamin A deficiency (VAD) or hypovitaminosis A is a lack of vitamin A in blood and tissues. It is common in poorer countries, especially among children and women of reproductive age, but is rarely seen in more developed countries.

What blocks vitamin A absorption?

• Zinc Deficiency Inhibits Vitamin A
• Your body stores excess vitamin A, which is a fat-soluble vitamin, in the fat cells and liver until needed.

How long does vitamin A stay in your system?

• When vitamin A is stopped, symptoms (except birth defects) usually resolve within 1 to 4 weeks.

Is it OK to take vitamin A every day?

• The maximum daily dose relates to only pre-formed vitamin A. Pre-formed vitamin A is possibly unsafe when taken in doses greater than 10,000 units (3,000 mcg) daily. Higher doses might increase the risk of side effects. Long-term use of large amounts might cause serious side effects including mental changes.

How long is vitamin A stored in the liver?

• The liver stores vitamins and minerals for the times when they may be lacking in the diet. It can store enough vitamin A and vitamin B12 for four years, and enough vitamin D for four months. Vitamins are a group of organic compounds that act as catalysts in various chemical reactions.

What is the best way to absorb vitamin A?

• Vitamin A is a fat-soluble vitamin that is best absorbed by your body when you eat it with foods containing fat. Good options are red meat, liver, cream or cheese, whole milk, olive oil, and fatty fish like salmon. If your overall diet is very low in fat, you may not absorb vitamin A efficiently.

Why am I not absorbing vitamin A?

• Vitamin A deficiency can also occur in adults with diseases of the gastrointestinal system that interfere with the absorption of vitamin A. These may include: ‌Celiac disease. Cirrhosis of the liver.

How long does it take to detox from vitamin A?

• Vitamin toxicity is treated by stopping the use of vitamin A supplements. Generally, signs and symptoms will resolve on their own within 1–4 weeks, depending on their severity. Birth defects caused by vitamin A toxicity during pregnancy are irreversible.

Can vitamin A cause fatty liver?

• Higher doses of vitamin A can be toxic, leading to a constellation of signs and symptoms as well as liver injury, jaundice, enlargement of the liver and spleen, portal hypertension, and cirrhosis.

How much is too much of vitamin A?

• Levels of up to 10,000 IU (3,000 mcg) have been considered safe. Beyond that, though, vitamin A can build up to cause liver damage and brain swelling; pregnant women who ingest too much run the risk of fetal damage.

Does the liver need vitamin A?

• The liver plays a central role in vitamin A metabolism: (1) it produces bile supporting efficient intestinal absorption of fat-soluble nutrients like vitamin A; (2) it produces retinol-binding protein 4 (RBP4) that distributes vitamin A, as retinol, to peripheral tissues; and (3) it harbors the largest body supply of