Food sources

Vitamin A is a fat-soluble substance. The digestion and absorption of vitamin A requires minerals and fat;

※Note: When supplementing vitamins in daily life, beta carotene in vitamin A is often used, because beta carotene does not contain vitamin A. Alcohol's potential toxicity, as well as its anti-cancer effects, can help reduce harmful cholesterol levels and reduce the incidence of heart disease.

Foods rich in vitamin A

Carrots, yellow and green vegetables, eggs, yellow fruits, spinach, pea sprouts, red sweet potatoes, green peppers, cod liver oil, animal liver, milk, Dairy products, cream.

Note: The color depth of fruits and vegetables is not an absolute indicator of the amount of vitamin A contained.

Nutritional supplements

There are two types of vitamin A supplements. One is extracted from cod liver oil; the other is water-soluble, derived from acetate or palm oil, and is most suitable for people who are allergic to oils, especially those who worry about acne. The general daily intake is 5,000 to 10,000IU

Vitamin A acid (retin A) is now used to treat and eliminate severe wrinkles, and it can only be purchased with a doctor's prescription.

Vitamin A

There are two types of vitamin A. One is vitamin A alcohol (retionl), which is the original form of vitamin A (only found in animal foods); the other is carotene (carotene), which is converted into a preformed substance of vitamin A (provitamin A, which can be Ingested from plant and animal foods); the measurement units of vitamin A are USP units (United States Pharmocopea), IU units (International Units), and RE units (Retinol Equivalents).

General functions

Prevent night blindness and vision loss, and help treat various eye diseases (vitamin A can promote the formation of photopigments in the eye);

Has anti-respiratory system infection effect;

Contributes to the normal function of the immune system;

Enables early recovery when sick;

Can maintain the surface layer of tissues or organs Health;

Helps remove age spots;

Promote development, strengthen bones, and maintain the health of skin, hair, teeth, and gums;

Topical use helps The treatment of acne, pustules, boils, skin surface ulcers and other diseases;

It is helpful in the treatment of emphysema and hyperthyroidism.

Normal needs

Vitamin A can be stored in the body and does not require daily supplementation;

The recommended daily intake of vitamin A is for an average adult For men, 1000RE (or 5000IU) can prevent deficiency, while for women, 800RE (4000IU) is needed. During pregnancy, the latest recommended intake does not recommend an increase, but if you are a breastfeeding mother, you can increase your intake by an additional 500 RE (or 2500 IU) in the first 6 months, and reduce it to an additional intake of 400 RE in the next 6 months. (or 2000 IU).

Vitamin A prevents and treats respiratory infections

Vitamin A is a component of the photoreceptor pigments of the retina (especially rhodopsin in rod cells). Its main function is to maintain visual function in dark light. . Its other function is to maintain the integrity of the respiratory mucosal epithelium, which has an important protective effect on the respiratory mucosa of children. It can also enhance the body's immunity

Vitamin A: Animal liver, egg yolk, cream and cod liver oil have the highest natural vitamin A content; among plant foods, dark-colored (red, yellow, green) vegetables For example, tomatoes, carrots, peppers, sweet potatoes, water spinach, amaranth and certain fruits such as bananas, persimmons, oranges, peaches, etc. contain more carotene.