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Let you know more about what is vitamin A

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Let you know more about what is vitamin A

Date of release:2018-11-02 Author: Click:

Vitamin A (vitamin A), also known as retinol (the aldehyde derivative retinal) or anti-dry eye factor, is an unsaturated monohydric alcohol with an alicyclic ring, including vitamin A1 and A2, which are animal food sources. A class of substances that have the biological activity of retinol.

Vitamin A1 is present in the liver of mammals and saltwater fish, and vitamin A2 is often found in the liver of freshwater fish. Since vitamin A2 is relatively low in activity, vitamin A is commonly referred to as vitamin A1.

Vitamin A is a fat-soluble vitamin in the classification. Vitamin D (also known as calciferol), vitamin E (also known as tocopherol) and vitamin K (also known as blood coagulation) are the same fat-soluble vitamins; the other is water-soluble. Sexual vitamins, mainly B vitamins (mainly including B1, B2, B3, B6, B12), vitamin C (also known as ascorbic acid), vitamin PP (also known as niacin), vitamin H (also known as biotin) and vitamin M (also known as folic acid) and so on.

production method

Natural vitamin A is extracted from cod liver oil. Among them, the fish liver is extracted from retinol (vitamin A1), and the freshwater fish liver is extracted from 3-dehydroretinol, vitamin A2.

There are many synthetic routes for retinol and its derivatives, and the Isler route is common, namely C13-C14-C20.

Firstly, β-ionone is condensed with ethyl chloroacetate, hydrolyzed and decarboxylated to obtain tetradecyl aldehyde; and acetylene sodium and methyl ketene are condensed, and the obtained substance is reacted with ethyl magnesium bromide to obtain magnesium dibromide. Compound. Condensation, hydrolysis and catalytic hydrogenation of dibromomagnesium with tetradecylaldehyde to obtain hydroxyvitamin A, and hydroxyvitamin acetate with acetyl chloride, followed by bromination and debromination to obtain vitamin acetate.

Vitamin A is a fat-soluble alcohol and has many molecular forms. Among them, VA1 is mainly found in the liver, blood and eyeball retina, also known as retinol, melting point 64 ° C, molecular formula C20H30O, VA2 is mainly present in freshwater fish, melting point is only 17 ~ 19 ° C, molecular formula C20H28O.

Vitamin A is a component of rhodopsin that forms a weak light in visual cells. Rhodopsin is composed of opsin and 11-cis-retinal, which is related to dark vision.

The lack of vitamin A in the human body can cause symptoms such as dry skin, scaling and hair loss.

Features

1。 It has the effect of regulating the metabolism of the epidermis and stratum corneum, and can resist aging and wrinkle。

2. It can reduce the sebum overflow and make the skin elastic, while dilute the spots and soften the skin.

3。 Helps protect the epidermis, the mucous membrane is not affected by bacteria, healthy skin, and prevent skin cancer。

4. Prevention of night blindness, vision loss, treatment of various eye diseases, so that women are good and good.

5。 Promote bone growth, help teeth grow and regenerate。

6。 Effectively prevent obesity and maintain a slim figure for women。

7。 Can help prevent hair loss。

Vitamin a effect

1。 Prevent night blindness and vision loss, and help to treat a variety of eye diseases (vitamin a can promote the formation of intraocular photoreceptors);

2. Have anti-respiratory system infection;

3。 Help the immune system function properly;

4. Get well soon when you are sick;

5. Can maintain the health of the surface of tissues or organs;

6. Helps to eliminate age spots;

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

8. External use can help the treatment of acne, pustules, acne, skin surface ulcers and other symptoms;

9。 Helps treat emphysema and hyperthyroidism。

10. Helps treat hair loss.

Vitamin A can increase the number of spleen PFCs in sheep erythrocyte or protein-immunized mice, and enhance the production of antibodies caused by non-T cell-dependent antigens. It also enhances PHA response and NK cell activity in human peripheral blood lymphocytes, increases macrophage activity, stimulates T cell proliferation and IL 2 production.

Tongxiang Jujia Food Additive Co。, Ltd。 products include more than 100 varieties of vitamins and their derivatives, minerals, amino acids, plant extracts, imported dairy products。 The sales network covers all parts of the country。 The company can not only provide high-quality products and services to our customers, but also help you solve technical problems in production。 If you want to understand the role of vitamin a can be contacted: 13356056388。

Vitamin A effect

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Key word:Whatisvitamina,Vitaminaproductionmethod,TheeffectofvitaminA

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Co。:Tongxiang Jujia Food Additive Co。, Ltd。

Add:2nd Floor, 1688-1690, Fuxing North Road, Wutong Street, Tongxiang City

TEL:0573-88080826

FAX:0573-88080810

MB:13356058388

Email:516860949@qq.com

Website:en。jxjujia。com

Vitamin a price, vitamin a effect, vitamin a food

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