Precautions for carotene, what is carotene

Food taboos. Carotene and vitamin A are fat-soluble substances that should be stir-fried in oil or stewed with meat before being consumed.

Do not overeat, a large intake of carotene will cause the pigment of ** to change and turn orange-yellow. Eating alcohol and carrots together will cause a large amount of carotene to enter the human body together with alcohol, and produce toxins in the liver, leading to liver disease.

Loose stools,** bright yellow, bruising and joint pain may occur during the medication.

It should be taken according to the recommended dosage and should not be used in excess of the recommended dose.

Carotene refers to a number of related unsaturated hydrocarbons, with the molecular formula C40H56, synthesized by plants, is an orange photosynthetic pigment, and is the main vitamin A source substance, mainly in three forms: A, , , the most important of which is -carotene. Food** is mainly dark vegetables and fruits. Carotene is one of the most common vitamin A supplements.

Vitamin A is essential for the development of human vision. If the body is deficient in vitamin A, there will be problems with vision and even night blindness.

Carotenoids are a general term for a class of compounds with a 040 tetraterpenoid structure and their derivatives, which have been extensively studied as antioxidants. It is made up of 8 isoprene-like units and is pigmented yellow, orange-red, or red. Carotenoids can be divided into 4 subfamilies:

carotene, such as -, carotene, and lycopene; carotenol, such as lutein, jade, astaxanthin; carotene esters, such as apo-carotenate; Carotene acids, such as crocin, annatto. All carotenoids can be derived from lycopene through oxidation, hydrogenation, dehydrogenation, cyclization, and carbon frame rearrangement degradation. When birds eat food containing this non-slippery compound, they tend to enrich these compounds in their egg yolks, so the egg yolk pigments are mainly carotene compounds.

Carotenoids can also be divided into two categories: carotene (carotene) and lutein (xanthophy), of which lutein is an oxidized carotene, the molecule contains one or more oxygen atoms, forming hydroxyl, carbonyl, methoxy or epoxide, several common carotenoids molecular structure withered wax formula, including lycopene, zeaxanthin all-trans Carotenoids (alltrans-carotene), antheraxanthin, carotenoids (-carotene), violaxanthin, canthaxanthin. People's diets contain 50 to 60 carotene compounds. More than 22 carotenoids and more than 8 metabolites have also been found in human plasma.

Among them, the main carotenoid compounds include -carotene, -carotene, lycopene, lutein, zeaxanthin and cryptoxanthin. There is a certain mutual synergy between different carotenoid compounds. Using the synergistic effect between carotenoids to develop some new carotenoid health or functional foods will be an important development direction of carotenoids.

In many health products also contain -carotene, because -carotene has a wide range of effects, -carotene is mainly reflected in the following aspects, first, he can delay the speed of human aging, which mainly depends on the fact that there is a substance in it that can resist free radicals, so as to avoid free radicals harming health. In the second aspect, it has the effect of moistening and laxative, because it has more fiber in it, and it is very absorbent, which can make the intestinal peristalsis faster, and then achieve the effect of laxative, and to a certain extent, it can also prevent bowel cancer. Thirdly, its effect is reflected in its ability to prevent the occurrence of allergies, especially the symptoms of allergic dermatitis and allergies to pollen.

As mentioned above, even if -carotene works, now we understand that it has a corresponding effect on ** and the body, in fact, in addition to the above effects, it also has a good effect on visual development, such as in resisting the damage caused by strong light to the eyes, it has played an excellent role.

1.Health care for the visual system.

The rods on the retina contain rhodopsin and function as scotopicia. Moderate amount of -carrot can promote rhodopsin to reach normal levels, thus avoiding the dulling of dark field adaptation caused by vitamin A deficiency, and also avoiding the damage to the eyes caused by bright light after dark vision.

2.Boosts immunity.

Carrots participate in the production of antibodies in the human body, which helps to maintain the normal function of the immune system, especially has a strong resistance to respiratory infections.

3.Slows down aging.

Carotene increases the activity of red blood cells. Free peroxide radicals can accelerate the aging of the human body, and people figuratively call it the "garbage" of the body. Carotene can neutralize peroxide free radicals in the body, which plays a role in delaying aging.

4.Laxative. Carrots contain plant fiber, which is highly absorbent and easy to expand in the intestines, and is a "filling substance" in the intestines, which can strengthen the peristalsis of the intestines, thereby laxative and cancer prevention.

5.Anti-allergic.

Japanese scientists have found that the -carotene in carrots can effectively prevent allergic diseases such as pollen allergies and atopic dermatitis, and -carotene can regulate the balance in cells, so that the body is not susceptible to allergic reactions.

1 Pinyin 2 English references.

3 Overview 4 Aliases for carotene.

5 Medical examination of carotene.

Check the name. Classification Principles of determination of carotene.

How to operate the reagent.

Normal test results are clinically significant.

6 Carotene drug instructions.

Another name for carotene.

Foreign name: indications, dosage, usage, leakage.

Specifications hú luó bo sù

carotene

Carotene has a similar chemical structure to vitamin A and can be converted into vitamin A in the body, so it is also known as provitamin A. The average absorption rate of carotene in the human body is 1 3 of the intake, and the conversion rate of conversion to vitamin A in the body is 1 2 of the absorption amount.

Betabalacarotene.

Carotene. Blood chemistry > serum vitamin assay.

After precipitating retinol-bound egg-binding protein (RBP) and carotene-bound lipoprotein in serum with ethanol, B carotene and vitamin A were extracted by petroleum ether at the same time by taking advantage of their hydrophobicity. The intensity of yellow in petroleum ether was determined at the wavelength of 440 450 nm to obtain the content of total carotene in the serum.

1) Absolute ethanol.

2) Petroleum ether: boiling point 40 60.

3) Carotene standard solution (prepared with petroleum ether.

1) Absorb 3ml of serum and put it in a 25ml glass plug grinding Erlenmeyer flask, add 3ml of absolute ethanol dropwise, and rotate and mix while adding. Add 6ml of petroleum ether, cover with a glass plug, swirl well and mix for about a few minutes.

2) Transfer to a 15ml centrifuge tube with a stopper, add a stopper, and centrifuge at low speed (about 900g) for about 1 2min.

3) Suck out all the petroleum ether layer and put it in a test tube with a plug to be measured.

4) Use a 450nm wavelength, 1cm cuvette, correct the absorbance to 0 point with petroleum ether, read the absorbance of the above extract, check the standard curve, and then obtain the content of serum carotene (retain the colorimetric solution for vitamin A determination).

The standard curve is plotted in the following table (Table 1).

50 g dl).

1) Increase: myxedema, diabetes, chronic nephritis. When carotene is ingested in large amounts, serum carotene can be reached, called carotenemia, and it disappears after a few weeks.

2) Reduce: cirrhosis of the liver.

It is not advisable to consume carotene-rich foods before blood drawing, such as green or yellow vegetables, such as spinach, grass, pea seedlings, leeks, red sweet potatoes, carrots, pumpkin, etc.

Diabetes, cirrhosis.

Betacarotene , carotene.

carotene

1.Prevention and treatment of tumors, used for the adjuvant of tumors**. 2.

Prevention and treatment of arteriosclerosis, coronary heart disease, stroke, cataract, and senile dementia. 3.Vitamin A deficiency.

4.Photosensitive dermatitis caused by erythropoietic protophylinosis. 5.

Adjuvant medication for immune diseases.

Take orally, 1 capsule daily.

The effect of gray carotene is still related to carrots, mainly trace elements extracted from carrots.

Chemically, carotene and carotene are isomers, and carotene can be converted into vitamin A.

Properties of carotene

Orange crystal, chemical properties are relatively stable, insoluble in water, slightly soluble in ethanol, soluble dust in petroleum ether and other organic solvents. According to the number of double bonds, carotene can be divided into three categories: , Carotene is the most important component of this.