Question: Which Physiologic Process Requires Vitamin B12?

What is vitamin B12 role in the body?

Vitamin B12 is a nutrient that helps keep the body’s nerve and blood cells healthy and helps make DNA, the genetic material in all cells. Vitamin B12 also helps prevent a type of anemia called megaloblastic anemia that makes people tired and weak.

For which group is taking vitamin B12 supplements the least beneficial quizlet?

For which group is taking vitamin B12 supplements the LEAST beneficial? People following strict vegan diets. Meeting vitamin B12 needs from the diet is especially difficult for what population group? Folic acid was added to white flour, cornmeal and pasta, and neural tube defects were substantially reduced.

Is required for absorption of vitamin B12 quizlet?

Adequate absorption of vitamin B12 requires adequate dietary intake, the presence of acid and pepsin in the stomach and proteases from the pancreas, functional intrinsic factor in gastric secretions, and an ileum with functioning receptors specific to vitamin B12.

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What is the main cause of vitamin B12 deficiency quizlet nutrition?

Where is vitmain B 12 found? A form of macrocytic anemia that is the primary cause of a vitamin B12 deficiency; occurs at the end stage of an autoimmune disorder that causes the loss of various cells in the stomach.

What medications should not be taken with B12?

Certain medications can decrease the absorption of vitamin B12, including: colchicine, metformin, extended-release potassium products, antibiotics (such as gentamicin, neomycin, tobramycin), anti-seizure medications (such as phenobarbital, phenytoin, primidone), medications to treat heartburn (such as H2 blockers

Are there any side effects taking vitamin B12?

Vitamin B-12 can cause very rare but serious allergic reactions (anaphylaxis). This includes swelling of the face, tongue, and throat, and difficulty swallowing and breathing. If this occurs after you take vitamin B-12, call 911 or your local emergency services immediately.

Which type of anemia is caused by a vitamin B12 deficiency?

Intrinsic factor is a protein made in the stomach. It is needed to absorb vitamin B12. This type of B12 deficiency anemia is called pernicious anemia.

Who is at risk for folate deficiency?

Folate deficiency is most commonly found in pregnant and lactating women, people with chronic conditions of the gastrointestinal tract, people following restricted diets due to weight-loss regimes or medical conditions, people with alcohol dependence and people more than 65 years of age.

What is the function of intrinsic factor in vitamin B12 absorption?

Intrinsic factor is a protein that helps your intestines absorb vitamin B12. It is made by cells in the stomach lining.

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Is required for absorption of vitamin B12?

Two steps are required for the body to absorb vitamin B12 from food. First, hydrochloric acid in the stomach separates vitamin B12 from the protein to which vitamin B12 is attached in food. After this, vitamin B12 combines with a protein made by the stomach called intrinsic factor and is absorbed by the body.

Where is Vitamin B12 primarily absorbed?

Vitamin B12 occurs in foods that come from animals. Normally, vitamin B12 is readily absorbed in the last part of the small intestine (ileum), which leads to the large intestine. However, to be absorbed, the vitamin must combine with intrinsic factor, a protein produced in the stomach.

What is the blood test for a B12 deficiency?

When a B12 level is normal or low normal but a deficiency is still suspected, a healthcare practitioner may order a methylmalonic acid (MMA) test as an early indicator of B12 deficiency. A low B12 and/or folate level means that you have a deficiency.

What is the most common cause of vitamin B12 deficiency?

However, the most common cause of vitamin B-12 deficiency anemia is a lack of a substance called intrinsic factor, which can be caused when your immune system mistakenly attacks the stomach cells that produce this substance. This type of anemia is called pernicious anemia.

What vitamin helps improve skin integrity?

A number of antioxidant chemicals, including vitamin C, are present in the skin (Thiele et al., 2001). These anti-oxidants maintain skin homeostasis; i.e., protection of proteins/lipids from oxidation (Tyrrell and Keyse, 1990; Thiele et al., 2001).

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What are the most toxic vitamins?

The fat-soluble vitamins, A, D, E, and K, are stored in the body for long periods of time and generally pose a greater risk for toxicity than water-soluble vitamins when consumed in excess.

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