Benefits and harms of vitamin A?

Vitamin A is found in the liver and milk products, helping to maintain visual health and cell activity. However, too much of this substance will cause serious health damage, especially for pregnant women.

Vitamin A and considerations for use

Vitamin A is a fat-soluble vitamin with 4 basic functions in the body:

1, Help the cell perform normal copying activity, otherwise they will undergo precancerous changes.

2, Essential for visual health, helps cells in a structure of the eye stay healthy. In addition, it is very important for the conversion of light into nerve signals in the retina.

3, Necessary for normal growth and development of embryos and fetuses. Vitamin A affects genes that determine the continuous development of certain organs during embryonic development.

4, Necessary for reproductive function, because it affects the function and development of sperm, ovaries and placenta.

Where does Vitamin A come from?

There are two main sources of vitamin A for the body:

1. Animals : (in the form of vitamin A: retinol) found in liver, milk, egg yolk .
2. Plants (in the form of vitamin A precursors: beta-carotene): available in yellow and green vegetables and fruits: cabbage, lettuce, carrots .

Vitamin A can also be found in supplements.

What diseases does Vitamin A relate to?

1- There is a close relationship with credible scientific evidence with the following diseases:

1. Anemia
2. Cystic fibrosis
3. Infection
4. Measles
5. Blind
6. Blind at night

2 - There is evidence of opposition, not clear and primitive about the relationship with the following diseases:

1. Bronchitis
2. Heart attack
3. Immune dysfunction
4. Anemia due to iron deficiency
5. Measles
6. Dysmenorrhea
7. Intestinal ulcer
8. Heal

3 - Relationship with ancient medicine and little impact on the following phenomena:

1. Acne
2. Support alcohol
3. Conjunctivitis
4. Crohn's disease
5. Diabetic retinitis
6. Diarrhea
7. Gastritis
8. Goiter
9. Lung cancer
10. Premenopausal syndrome
11. Urinary tract infections
12. Vaginitis

Who is prone to vitamin A deficiency?

1. People who abstain from liver, dairy products and vegetables containing beta carotene - vitamin A prefixes and will turn into this element in the body.
2. Infants are too light weight
3. People with hypothyroidism cause decreased activity of converting beta carotene to vitamin A.
4. Elderly people with type 2 diabetes
5. The earliest signs of vitamin A deficiency are weak night vision. Also may be skin dryness, susceptibility to infections and metaplasia disease (a precancerous disease).

How to add?

Vitamin A supplies the body mainly through food and vitamin supplements. Daily vitamin A needs of the body:

1. Men: 3,000UI.
2. Female: 2,300UI.
3. Pregnant and lactating women: 3,000UI.
4. Children: 2,000UI.

However, people over 65 years of age or liver disease do not exceed 15,000 IU / day, unless directed by a doctor. For pregnant women, the level of dark absorption is still being reassessed, but less than 10,000 IU (3,000 mcg) per day is safe.

Note when using vitamin A

When vitamin A is of animal origin (Retinol), it provides the body with many times the daily needs for a long time, causing harm to the body such as:

1. Hepatotoxicity.
2. Causing disability to the fetus.
3. Hair loss.
4. Osteoporosis.
5. Disorders of skin pigmentation.
6. Dry skin.
7. Anorexia.
8. Diarrhea.
9. Nausea.
10. Dizzy…

With plant-derived vitamin A (beta-carotene), excess supply causes jaundice. When you stop using it for a while, this phenomenon will disappear.

Some drugs such as neomycin, cholestyramine, liquid paraffin reduce vitamin A absorption, so be careful not to use it together.

Contraceptives can increase plasma levels of vitamin A and have an unfavorable effect on conception.

Vitamin A should be avoided with retinoids (substances with the same chemical formula as vitamin A) because of the harmful effects of high doses of vitamin A in the long term.