CN108523126B - Composition for improving blood sugar level and preparation method thereof - Google Patents

Composition for improving blood sugar level and preparation method thereof Download PDF

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CN108523126B
CN108523126B CN201810373933.3A CN201810373933A CN108523126B CN 108523126 B CN108523126 B CN 108523126B CN 201810373933 A CN201810373933 A CN 201810373933A CN 108523126 B CN108523126 B CN 108523126B
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powder
chestnut
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shell
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CN108523126A (en
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蒋丽
林桂纯
蒋镇
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Guangzhou Zhengguang Biological Technology Co ltd
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    • A23L33/00Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof
    • A23L33/10Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof using additives
    • A23L33/105Plant extracts, their artificial duplicates or their derivatives
    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23LFOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
    • A23L33/00Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof
    • A23L33/10Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof using additives
    • A23L33/125Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof using additives containing carbohydrate syrups; containing sugars; containing sugar alcohols; containing starch hydrolysates
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    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
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    • A61K31/00Medicinal preparations containing organic active ingredients
    • A61K31/70Carbohydrates; Sugars; Derivatives thereof
    • A61K31/715Polysaccharides, i.e. having more than five saccharide radicals attached to each other by glycosidic linkages; Derivatives thereof, e.g. ethers, esters
    • A61K31/716Glucans
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K36/00Medicinal preparations of undetermined constitution containing material from algae, lichens, fungi or plants, or derivatives thereof, e.g. traditional herbal medicines
    • A61K36/18Magnoliophyta (angiosperms)
    • A61K36/185Magnoliopsida (dicotyledons)
    • A61K36/49Fagaceae (Beech family), e.g. oak or chestnut
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K36/00Medicinal preparations of undetermined constitution containing material from algae, lichens, fungi or plants, or derivatives thereof, e.g. traditional herbal medicines
    • A61K36/18Magnoliophyta (angiosperms)
    • A61K36/185Magnoliopsida (dicotyledons)
    • A61K36/60Moraceae (Mulberry family), e.g. breadfruit or fig
    • A61K36/605Morus (mulberry)
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P3/00Drugs for disorders of the metabolism
    • A61P3/08Drugs for disorders of the metabolism for glucose homeostasis
    • A61P3/10Drugs for disorders of the metabolism for glucose homeostasis for hyperglycaemia, e.g. antidiabetics
    • AHUMAN NECESSITIES
    • A23FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23VINDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION
    • A23V2002/00Food compositions, function of food ingredients or processes for food or foodstuffs

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Abstract

The invention relates to a composition for improving blood sugar level and a preparation method thereof, wherein the composition comprises the following raw materials: 25-40 parts of chestnut peel extract, 10-20 parts of mulberry leaf extract, 3-5 parts of oat beta-glucan, and also can be further added with 5-10 parts of bitter gourd powder, 1-2 parts of chromium-containing yeast powder, 5-10 parts of bitter gourd extract, 10-20 parts of barley malt, 5-10 parts of haematococcus pluvialis powder, 3-5 parts of oat fiber, 5-10 parts of yam powder, 1-2 parts of chrysanthemum powder, 3-5 parts of buckwheat powder, 4-7 parts of polygonatum powder, 3-5 parts of radix puerariae powder and 20.1-1 parts of vitamin B.

Description

Composition for improving blood sugar level and preparation method thereof
Technical Field
The invention relates to the technical field of health food and processing treatment thereof, in particular to a nutritional composition capable of improving blood sugar level and a preparation method thereof.
Background
With the improvement of life quality, the dietary structure is continuously changed, more and more high-sugar and high-fat foods are ingested, the incidence rate of diabetes is rapidly increased, the diabetes is second to cardiovascular diseases and tumors at present, the third most common disease is diabetes, the diabetes is a chronic disease, the prevalence rate of diabetes of Chinese adults is as high as nearly 10%, and the control and prevention of diabetes are very difficult. The prevention or improvement of blood sugar level is important for the treatment of diabetes, and when medication is used, daily diet is also important, and improper diet control can cause fluctuation of blood sugar and even aggravate the risk of hyperglycemia.
At present, more researches focus on traditional Chinese medicines or health care products with homology of medicine and food to control the blood sugar level. For example, chinese patent CN2014102044678 discloses a nutritional meal replacement powder suitable for people with hyperglycemia, which comprises dietary fiber powder, fruit and vegetable powder, mulberry leaf extract, maltodextrin, stevioside, hydrolyzed whey protein, multivitamins and complex minerals, has a certain auxiliary blood sugar lowering effect on diabetes patients, has good taste, and can be taken as meal replacement food. Chinese patent CN2008100066094 discloses a special diet containing short peptides for diabetic patients, which takes food-borne short peptides as main raw materials, adds extracts of Chinese yam, mulberry leaf, kudzuvine root, Siberian solomonseal rhizome, corn silk, tuckahoe, dark plum fruit, fragrant solomonseal rhizome and other medicinal and edible Chinese herbal medicines, and then is supplemented with oligopeptide, vitamin and mineral matter to form a compound formula, and can assist and control the blood sugar level of the diabetic patients, improve the immunity of the organism and prevent diabetic complications through the combined action of the food-borne short peptides, bioactive components in the medicinal and edible Chinese herbal medicine extracts, the oligopeptide and other various silvers.
It can be seen that, because the etiology and mechanism of diabetes are complex, the research at present is mainly focused on adopting composite compositions, and the full play of the cooperativity of the formula through the mutual compatibility of multiple components is a research hotspot at present.
The extract of the chestnut shell has been studied to control the blood sugar level, and Japanese patent laid-open No. 2006-1872 discloses the use of the extract of the chestnut shell for controlling blood sugar. Chinese patent CN2014102016199 also discloses a method for extracting and purifying components inhibiting the activity of alpha-glucosidase from chestnut shells, which can be used for treating diabetes and obesity.
Disclosure of Invention
The invention aims to provide a composition capable of improving blood sugar level and a preparation method thereof, and the composition is rich in nutrition, convenient to eat, and capable of adjusting the blood sugar level and improving immunity.
The technical scheme of the invention is as follows.
Use of a composition comprising chestnut shell extract for the preparation of a food or pharmaceutical product for improving blood glucose levels.
A composition for improving blood sugar level comprises chestnut peel extract 25-40 parts, folium Mori extract 10-20 parts, and oat beta-dextran 3-5 parts, wherein the chestnut peel extract is obtained by extracting shell and endothelium together, wherein the ratio of chestnut shell and endothelium is 8-12: 1-3.
The chestnut shell (chestnut shell) is a shell for wrapping chestnut meat, and the shell is not a shell containing burrs if the chestnut is purchased daily.
Further, the chestnut peel extract is extracted by one or more mixed solvents selected from ethanol, butanol and water.
Inhibition of alpha-glucosidase and alpha-amylase activity in the gut is considered to be an effective method for the control of diabetes, as described in the background above, and related studies have explored the inhibition of alpha-glucosidase and alpha-amylase activity by chestnut peel extracts. In the research, the single chestnut peel extract has limited improvement effect, and the effect of improving the blood sugar level can be promoted to a certain extent by using other extracts and the chestnut peel together.
The composition for improving the blood sugar level also comprises 40 parts of chestnut peel extract, 15 parts of mulberry leaf extract and 5 parts of oat beta-glucan.
Further, the composition may further comprise one or more of fructus Momordicae Charantiae powder, chromium-containing yeast powder (chromium-rich yeast), fructus Momordicae Charantiae extract, fructus Hordei Germinatus, Haematococcus pluvialis powder, herba Avenae Fatuae fiber, rhizoma Dioscoreae powder, flos Chrysanthemi powder, semen Fagopyri Esculenti powder, rhizoma Polygonati Odorati powder, radix Puerariae powder, and vitamin B2; the contents of the components are as follows: 5-10 parts of bitter gourd powder, 1-2 parts of chromium-containing yeast powder, 5-10 parts of bitter gourd extract, 10-20 parts of barley malt, 5-10 parts of haematococcus pluvialis powder, 3-5 parts of oat fiber, 5-10 parts of yam powder, 1-2 parts of chrysanthemum powder, 3-5 parts of buckwheat powder, 4-7 parts of polygonatum powder, 3-5 parts of radix puerariae powder and 20.1-1 parts of vitamin B.
Further, the components comprise 30 parts of chestnut peel extract, 15 parts of mulberry leaf extract, 15 parts of barley malt, 5 parts of bitter gourd powder, 1 part of chromium-containing yeast powder, 10 parts of bitter gourd extract, 3 parts of oat beta-glucan, 10 parts of haematococcus pluvialis powder, 3 parts of oat fiber, 5 parts of yam powder, 1 part of chrysanthemum powder, 4 parts of buckwheat powder, 5 parts of polygonatum powder, 5 parts of radix puerariae powder and 20.3 parts of vitamin B.
The composition can also comprise 40 parts of chestnut peel extract, 10 parts of mulberry leaf extract, 10 parts of barley malt, 5 parts of bitter gourd powder, 1 part of chromium-containing yeast powder, 10 parts of bitter gourd extract, 3 parts of oat beta-glucan, 5 parts of haematococcus pluvialis powder, 3 parts of oat fiber, 5 parts of yam powder, 1 part of chrysanthemum powder, 3 parts of buckwheat powder, 4 parts of polygonatum powder, 5 parts of radix puerariae powder and 20.5 parts of vitamin B.
Preferably, the preparation method of the chestnut peel extract comprises the following steps:
(1) pre-treating, washing chestnut shell and chestnut inner skin, oven drying, and pulverizing into 50-80 mesh powder;
(2) soaking the inner skin and shell of chestnut in 55-60% ethanol solution for 3-5 hr, transferring the inner skin and shell of chestnut to an extraction tank, adding ethanol with a material-liquid ratio of 1:18-24 and ethanol concentration of 45-55%, reflux extracting for 2-3 times, each for 1-3 hr;
(3) combining the extracts, and removing the residue by filtration; concentrating under reduced pressure at 40-50 deg.C for 0.5-4 hr to obtain concentrated extract;
(4) freeze drying the concentrated extract to obtain powdered chestnut peel extract.
As for the chestnut extract, the chestnut shell and chestnut inner skin extract have certain effect of improving blood sugar, and researches show that when the chestnut shell and the chestnut inner skin extract are extracted together, the components have mutual dissolution promoting effect, and the obtained extract has better effect than the effect of improving the blood sugar level when a single component is extracted.
The preparation method of the composition for improving the blood sugar level comprises the following steps:
(1) weighing the raw materials according to the weight percentage, and mixing the raw materials into a mixed material;
(2) grinding the mixture, and sieving with 80-100 mesh sieve;
(3) sterilizing, cooling to room temperature, and packaging.
Further, the sterilization treatment adopts a microwave drying treatment mode, and the treatment conditions are as follows: the microwave power is 20-50kW, and the frequency is 2450 MHz.
Further, the composition can be packaged to provide a pouch product for ease of consumption.
Further, the product prepared by the preparation method can be food, health-care food or medicine, and is used for intervening or improving the blood sugar level.
In the prior art research, the mechanism of reducing blood fat by single components or monomers extracted from medicinal and edible traditional Chinese medicines is advanced to the molecular and gene level. Different compositions interfere the blood sugar level through multiple ways, multiple links and multiple targets, and all components interact and influence each other, so that the full synergy of the formula is the key point of research. The composition can effectively improve the blood sugar level by selecting a plurality of nutritional factor combinations with the function of improving the blood sugar level, and has rich nutrition and convenient eating.
According to researches, although chestnut peel extract is utilized as a relevant document for improving blood sugar level, the chestnut peel and the inner skin are compositely extracted according to the ratio of 8-12:1-3, so that the extraction of effective components is more facilitated, in addition, the mutual promotion effect of mulberry leaf extract, oat beta glucan and the chestnut peel extract also brings great influence on the improvement of the blood sugar level, alpha-amylase hydrolyzes carbohydrate into disaccharide, the disaccharide is hydrolyzed into monosaccharide by the alpha-glucosidase, and the inhibition effect on the activity of the alpha-glucosidase and the alpha-amylase in intestinal tracts is considered to be an effective method for controlling diabetes. The compositions of the present invention, as a whole, are compatible with each other to synergistically promote, inter alia, unexpected technical effects in inhibiting the activities of α -glucosidase and α -amylase and regulating blood glucose levels.
Detailed Description
Example 1
(1) Weighing 40 parts of chestnut peel extract, 15 parts of mulberry leaf extract and 5 parts of oat beta-glucan, and mixing to obtain a mixed material;
(2) grinding the mixture, sieving with 80-100 mesh sieve, and performing microwave drying treatment for sterilization under the following conditions: the microwave power is 20-50kW, and the frequency is 2450 MHz;
(3) sterilizing, cooling to room temperature, and packaging.
The preparation method of the chestnut peel extract comprises the following steps: (1) pre-treating, namely respectively cleaning, drying and crushing the chestnut shells and the chestnut endothelium, wherein the crushing mesh is 50-80 meshes, and the weight ratio of the chestnut shells to the chestnut endothelium is 9: 2;
(2) soaking the inner skin and shell of chestnut in 55-60% ethanol solution for 4 hr, transferring the inner skin and shell of chestnut to an extraction tank, adding ethanol at a ratio of material to liquid of 1:20, wherein the ethanol concentration is 45-55%, and extracting under reflux for 3 times, each time for 1.5 hr;
(3) combining the extracts, and removing the residue by filtration; concentrating under reduced pressure at 40-50 deg.C for 3 hr to obtain concentrated extract;
(4) freeze drying the concentrated extract to obtain powdered chestnut peel extract.
Example 2
(1) Weighing 40 parts of chestnut peel extract, 40 parts of mulberry leaf extract and 30 parts of oat beta-glucan, and mixing to obtain a mixed material;
(2) grinding the mixture, sieving with 80-100 mesh sieve, and performing microwave drying treatment for sterilization under the following conditions: the microwave power is 20-50kW, and the frequency is 2450 MHz;
(3) sterilizing, cooling to room temperature, and packaging.
The preparation method of the chestnut peel extract comprises the following steps: (1) pre-treating, namely respectively cleaning, drying and crushing the chestnut shells and the chestnut endothelium, wherein the crushing mesh is 50-80 meshes, and the weight ratio of the chestnut shells to the chestnut endothelium is 1: 1;
(2) soaking the inner skin and shell of chestnut in 55-60% ethanol solution for 4 hr, transferring the inner skin and shell of chestnut to an extraction tank, adding ethanol at a ratio of material to liquid of 1:20, wherein the ethanol concentration is 45-55%, and extracting under reflux for 3 times, each time for 1.5 hr;
(3) combining the extracts, and removing the residue by filtration; concentrating under reduced pressure at 40-50 deg.C for 3 hr to obtain concentrated extract;
(4) freeze drying the concentrated extract to obtain powdered chestnut peel extract.
Example 3
A composition for improving blood glucose level comprises the following components: 40 parts of chestnut peel extract, 10 parts of mulberry leaf extract, 10 parts of barley malt, 5 parts of bitter gourd powder, 1 part of chromium-containing yeast powder, 10 parts of bitter gourd extract, 5 parts of oat beta-glucan, 5 parts of haematococcus pluvialis powder, 3 parts of oat fiber, 5 parts of Chinese yam powder, 1 part of chrysanthemum flower powder, 3 parts of buckwheat powder, 4 parts of polygonatum powder, 5 parts of radix puerariae powder and 20.5 parts of vitamin B.
The preparation method comprises the following steps: (1) weighing the raw materials according to the weight percentage, and mixing the raw materials into a mixed material; (2) grinding the mixture, and sieving with 80-100 mesh sieve; (3) performing sterilization treatment on the product, wherein the sterilization treatment adopts a microwave drying treatment mode, and the treatment conditions are as follows: the microwave power is 20-50kW, and the frequency is 2450 MHz; cooling to room temperature, and packaging.
The preparation method of the chestnut peel extract comprises the following steps: (1) pre-treating, namely respectively cleaning, drying and crushing the chestnut shells and the chestnut endothelium, wherein the crushing mesh is 50-80 meshes, and the weight ratio of the chestnut shells to the chestnut endothelium is 9: 2;
(2) soaking the inner skin and shell of chestnut in 55-60% ethanol solution for 4 hr, transferring the inner skin and shell of chestnut to an extraction tank, adding ethanol at a ratio of material to liquid of 1:20, wherein the ethanol concentration is 45-55%, and extracting under reflux for 3 times, each time for 1.5 hr;
(3) combining the extracts, and removing the residue by filtration; concentrating under reduced pressure at 40-50 deg.C for 3 hr to obtain concentrated extract;
(4) freeze drying the concentrated extract to obtain powdered chestnut peel extract.
Comparative example 1
(1) Weighing 60 parts of chestnut peel extract;
(2) grinding the chestnut peel extract, sieving with a 80-100 mesh sieve, and performing microwave drying treatment for sterilization under the following conditions: the microwave power is 20-50kW, and the frequency is 2450 MHz;
(3) sterilizing, cooling to room temperature, and packaging.
The chestnut shell extract was prepared in the same manner as in example 1.
Comparative example 2-1
(1) Grinding 40 parts of chestnut peel extract, sieving with a 80-100 mesh sieve, and performing microwave drying treatment for sterilization under the following treatment conditions: the microwave power is 20-50kW, and the frequency is 2450 MHz;
(2) sterilizing, cooling to room temperature, and packaging.
The preparation method of the chestnut peel extract comprises the following steps: (1) pretreating, cleaning, drying and crushing chestnut shells, wherein the crushing mesh number is 50-80 meshes;
(2) soaking pulverized chestnut shell in 55-60% ethanol solution for 4 hr, transferring the chestnut shell into an extraction tank, adding ethanol with a material-liquid ratio of 1:20, wherein the ethanol concentration is 45-55%, and reflux-extracting for 3 times, each for 1.5 hr;
(3) combining the extracts, and removing the residue by filtration; concentrating under reduced pressure at 40-50 deg.C for 3 hr to obtain concentrated extract;
(4) freeze drying the concentrated extract to obtain powdered chestnut peel extract.
Comparative examples 2 to 2
(1) Grinding 40 parts of chestnut peel extract, sieving with a 80-100 mesh sieve, and performing microwave drying treatment for sterilization under the following treatment conditions: the microwave power is 20-50kW, and the frequency is 2450 MHz;
(2) sterilizing, cooling to room temperature, and packaging.
The preparation method of the chestnut shell extract is the same as that of the comparative example 2-1, the raw materials are different, and the chestnut shells are replaced by the chestnut inner shells with the same total weight fraction.
Effect of the experiment
The composition has alpha-glucosidase inhibiting effect.
And detecting the reaction of PNPG and alpha-glucosidase to generate yellow-green p-nitrophenol, and judging the inhibitory activity of the sample according to the absorbance of the solution.
The determination method is judged by using the common absorbance value in the prior art, and specifically comprises the following steps: 100. mu.L (100 mmol/L) of PNPG was added to 850. mu.L of phosphate buffer. Then adding the sample solution, wherein the mass concentration of the sample solution is 50 mug/mL. The control group is a reaction system without adding enzyme and sample solution to eliminate the influence of p-nitrophenol generated by PNPG oxidation on the determination result, the blank group is a system with enzyme but no sample solution, and the background control group is a system with inhibitor but no enzyme. Incubating at 37 deg.C for 10min, adding alpha-glucosidase 50 μ L, incubating for 50min, adding 1mL sodium carbonate to terminate reaction, and measuring absorbance at 405 nm; wherein the sample solutions were set as example 1, example 2, comparative example 1, comparative examples 2-1, 2-2.
Inhibition (100%) =100 x [ a-B- (C-D) ]/(a-B);
where A is the reading of the blank at A520, B is the reading of the control at A520, C is the reading of the sample solution at A520, and D is the reading of the background control at A520.
The results show that the inhibition rates are respectively: the inhibition ratio of example 1 was 95.2%, the inhibition ratio of example 2 was 90.4%, the inhibition ratio of comparative example 1 was 86.7%, and the inhibition ratios of comparative examples 2-1 and 2-2 were 75.7% and 79.8%.
Determination of blood glucose levels
The test method comprises the following steps: male mice were selected for SPF grade, free to ingest, drink, and after 1 week of adaptive feeding, prohibited for 24h, and mice were randomly divided into 6 groups: example 3 low dose group, example 3 medium dose group, example 3 high dose group, positive drug group, model control group, blank control group. The experimental group (except blank control group) is injected intraperitoneally with the modeling agent, after 5d, the patient is fasted for 4h, and the blood sugar is measured, wherein the blood sugar value is more than 10mmol/L, and the group is the diabetes model group.
A molding agent: streptozotocin (STZ), freshly prepared at a concentration of 13.0mg/ml with 0.1mol/L, pH =4.2 sodium citrate buffer.
And (3) testing a sample: prepared as in example 3, suspensions of 10mg/ml, 20mg/ml, 40mg/ml, respectively, were prepared in water.
Positive drug: acarbose tablets were ground to a powder and made up in water to a suspension with a concentration of 10 mg/ml.
The experimental method comprises the following steps: the oral gavage is carried out, a blank control group is a normal feeding mouse, molding treatment is not carried out, and a model group is gavage with normal saline with the same volume.
The experimental time was 30 days, and the dose was given daily at regular intervals. Blood glucose values were measured on days 0, 10, 20, and 30.
Percent blood glucose decrease = (blood glucose before experiment-blood glucose after experiment)/blood glucose before experiment x 100%.
Data analysis
The differences were analyzed using SPSS software.
Compared with the model group, the positive drug group has a significant blood sugar lowering effect, and the composition of the embodiment 3 of the invention has a blood sugar improving effect in all three dose groups, and the effect is weaker than that of the positive drug group.
Group of Blood sugar mmol/L (0 d) Blood sugar mmol/L (10 d) Blood sugar mmol/L (20 d) Blood sugar value mmol/L (30 d) Percentage of blood glucose decrease
Low dose group 20.35±1.22 18.34±2.22 17.65±1.49 16.18±1.25 20.49%
Middle dose group 20.14±1.32 18.01±2.31 16.14±1.56 14.01±1.68 30.43%
High dose group 20.89±1.28 17.45±2.17 14.38±1.78 11.25±1.78 46.15%
Blank group 4.58±0.42 4.55±0.74 4.54±0.23 4.53±0.15 1.09%
Model control group 21.13±1.41 23.25±2.24 26.78±2.64 29.37±2.15 -39.35%
Positive drug group 20.94±1.29 15.78±2.14 12.46±2.31 8.79±1.57 58.23%
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (4)

1. A composition capable of improving blood sugar level is characterized by comprising 25-40 parts of chestnut peel extract, 10-20 parts of mulberry leaf extract, 3-5 parts of oat beta-glucan, 5-10 parts of bitter gourd powder, 1-2 parts of chromium-containing yeast powder, 5-10 parts of bitter gourd extract, 10-20 parts of barley malt, 5-10 parts of haematococcus pluvialis powder, 3-5 parts of oat fiber, 5-10 parts of yam powder, 1-2 parts of chrysanthemum powder, 3-5 parts of buckwheat powder, 4-7 parts of polygonatum odoratum powder, 3-5 parts of radix puerariae powder and 20.1-1 parts of vitamin B, wherein the chestnut peel extract is obtained by extracting shells and endothelium together to obtain an extract, wherein the ratio of the chestnut shell to the endothelium is 9: 2;
the preparation method of the chestnut peel extract comprises the following steps: (1) pre-treating, washing chestnut shell and chestnut inner skin, oven drying, and pulverizing into 50-80 mesh powder;
(2) soaking the inner skin and shell of chestnut in 55-60% ethanol solution for 3-5 hr, transferring the inner skin and shell of chestnut to an extraction tank, adding ethanol with a material-liquid ratio of 1:18-24 and ethanol concentration of 45-55%, reflux extracting for 2-3 times, each for 1-3 hr;
(3) combining the extracts, and removing the residue by filtration; concentrating under reduced pressure at 40-50 deg.C for 0.5-4 hr to obtain concentrated extract;
(4) freeze drying the concentrated extract to obtain powdered chestnut peel extract.
2. A method for preparing the composition for improving blood glucose level according to claim 1, comprising the steps of:
(1) weighing the raw materials in parts by weight, and mixing to obtain a mixed material;
(2) grinding the mixture, and sieving with 80-100 mesh sieve;
(3) sterilizing, cooling to room temperature, and packaging.
3. The method according to claim 2, wherein the sterilization treatment is a microwave drying treatment under the following conditions: the microwave power is 20-50kW, and the frequency is 2450 MHz.
4. The method according to claim 2, wherein the product is processed into health food or medicine.
CN201810373933.3A 2018-04-24 2018-04-24 Composition for improving blood sugar level and preparation method thereof Active CN108523126B (en)

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