Fat-reducing nutritional composition capable of improving metabolism and preparation method of fat-reducing nutritional composition

Abstract

The invention relates to the technical field of nutritional supplements. A traditional fat reducing method mainly comprises dieting, high-intensity exercise, medicine weight losing and the like. However, dieting may lead to malnutrition; high-intensity sports are difficult to insist, and sports injury is easily caused; in order to solve the technical problems, the invention discloses a fat-reducing nutritional composition capable of improving metabolism, and the fat-reducing nutritional composition can be used for solving the technical problems of severe side effects such as tachycardia, insomnia and the like caused by medicine weight loss. The composition comprises the following components in parts by weight: 13-21 parts of a bitter gourd extract, 15-31 parts of a garcinia cambogia extract, 13-17 parts of oat fibers, 17-23 parts of whey protein powder, 7-9 parts of linseed oil, 6-14 parts of a green tea extract, 9-15 parts of a calcium supplement and 15-19 parts of a purple perilla seed extract, and can provide energy for a user, supplement immune globulin, lactoferrin and a calcium source, improve the immunity of the user and improve the immunity of the user. The body metabolism level and immunocompetence are improved, absorption of fat in digestive tracts can be effectively inhibited, storage of fat in the body is reduced, fat consumption is promoted, and the fat reducing effect is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of nutritional supplements, and in particular to a fat-reducing nutritional composition for improving metabolism and a preparation method thereof. Background Art

[0002] With the acceleration of modern life and changes in eating habits, obesity has become a global health challenge. Obesity not only affects personal appearance and self-confidence, but is also closely related to a variety of chronic diseases such as cardiovascular disease, diabetes, hypertension, etc., which seriously threatens human life and health. Therefore, the development of safe and effective fat-reducing products has become a hot topic in current research.

[0003] Traditional methods of fat loss mainly include dieting, high-intensity exercise, and drug-induced weight loss. However, these methods all have some disadvantages. Dieting may lead to malnutrition and affect physical health; high-intensity exercise is difficult for some people to stick to and is prone to sports injuries; drug-induced weight loss may bring serious side effects, such as tachycardia, insomnia, constipation, etc. Therefore, it is particularly important to find a safe, effective, and easy-to-accept method for fat loss.

[0004] In recent years, with the deepening of natural product research, more and more scientists have begun to pay attention to the application of plant extracts in fat reduction. Plant extracts are rich in a variety of active ingredients, such as polyphenols, flavonoids, alkaloids, etc. These ingredients have a variety of functions such as regulating human metabolism, inhibiting fat absorption and synthesis, and promoting fat decomposition and excretion. Therefore, using plant extracts as the core ingredient of fat-reducing products and combining them with other nutrients for scientific proportions has become an effective way to develop new fat-reducing products.

[0005] However, there are many kinds of fat-reducing products on the market, but many of them are not effective and even have potential safety risks. This is mainly because the product formula is unreasonable or the preparation process of the extract is not rigorous, resulting in low content and poor stability of active ingredients, thus affecting the fat-reducing effect of the product.

[0006] Therefore, developing a scientific and effective fat-reducing nutritional composition is of great significance for meeting the health needs of consumers and promoting the development of the fat-reducing industry. Summary of the invention

[0007] The technical problem to be solved by the present invention is to overcome the defects of the above-mentioned technologies and provide a fat-reducing nutritional composition for improving metabolism and a preparation method thereof.

[0008] To solve the above technical problems, the technical solution provided by the present invention is a fat-reducing nutritional composition for enhancing metabolism, wherein the composition comprises the following components by weight: 13-21 parts of bitter melon extract, 15-31 parts of garcinia cambogia extract, 13-17 parts of oat fiber, 17-23 parts of whey protein powder, 7-9 parts of flaxseed oil, 6-14 parts of green tea extract, 9-15 parts of calcium supplement, and 15-19 parts of perilla seed extract.

[0009] Furthermore, the composition comprises the following components in parts by weight: 17 parts of bitter melon extract, 23 parts of garcinia cambogia extract, 15 parts of oat fiber, 20 parts of whey protein powder, 8 parts of flaxseed oil, 10 parts of green tea extract, 12 parts of calcium supplement, and 17 parts of perilla seed extract.

[0010] Furthermore, the preparation method of the bitter melon extract comprises the following steps:

[0011] 3.1) removing seeds from fresh bitter melon, slicing, drying at 60-100° C. for 60-120 minutes to remove moisture, and then crushing into bitter melon particles with a particle size of 0.2-0.5 mm;

[0012] 3.2) placing the obtained bitter melon particles into an extraction container, adding the bitter melon particles to anhydrous ethanol at a solid-liquid ratio of 0.3-0.4 g / mL, heating and refluxing for extraction, the extraction temperature is 60-70° C., the extraction time is 120-180 minutes, after the extraction is completed, filtering, removing the filter residue, and obtaining an ethanol extract;

[0013] 3.3) The obtained ethanol extract is concentrated under reduced pressure, and the pressure is controlled at 40-100 kPa to obtain a concentrated solution. Then, the concentrated solution is vacuum dried, and the pressure is controlled at 10 kPa to 50 kPa and the drying temperature is 50-80° C. to obtain a powdered bitter melon extract.

[0014] Furthermore, the preparation method of the Garcinia cambogia extract comprises the following steps:

[0015] 4.1) Selecting high-quality garcinia cambogia and washing it, and then crushing the garcinia cambogia to obtain garcinia cambogia tissue powder;

[0016] 4.2) Add the garcinia cambogia powder to the extraction tank, add water according to 6-8 times the weight of the raw material, heat to 90-95°C, keep warm and extract for 120 minutes, filter, add the same proportion of water to the residue and continue to extract for 120 minutes, and combine the two extracts;

[0017] 4.3) The combined extract is pumped into a single-effect concentrator for concentration, the vacuum degree is controlled at 60-80 kPa, the concentration temperature is 60-80° C., the concentrated extract is spray-dried, the inlet air temperature is controlled at 150-165° C., the outlet air temperature is controlled at 65-85° C., the temperature in the tower is controlled at 75-90° C., and the negative pressure is controlled at 0.01-0.018 kPa to obtain a dry garcinia cambogia extract powder, which can be sieved to obtain a powdered garcinia cambogia extract.

[0018] Furthermore, the preparation method of the green tea extract comprises the following steps:

[0019] 5.1) Selecting dried green tea as raw material and crushing it to obtain green tea powder;

[0020] 5.2) Weigh green tea powder, add it to 70% edible alcohol solution, control the solid-liquid ratio of green tea powder to edible alcohol solution to be 1:12, mix well, and obtain a mixed solution;

[0021] 5.3) placing the mixed solution in an ultrasonic extraction device, controlling the ultrasonic extraction power to 300-320W, the extraction temperature to 40-50°C, and the extraction time to 50-70 minutes. After the extraction is completed, filtering the solution to remove the tea residue to obtain an extract;

[0022] 5.4) The obtained extract is centrifuged at a speed of 7000-9000 r / min for 10-20 minutes to obtain a supernatant. The supernatant is concentrated and then vacuum dried at a controlled pressure of 8-21 kPa and a drying temperature of 30-60° C. to obtain a green tea powder extract.

[0023] Furthermore, the preparation method of the perilla seed extract comprises the following steps:

[0024] 6.1) Take perilla seeds, crush them, and sieve them to obtain 40-60 mesh perilla seed powder;

[0025] 6.2) Add the perilla seed powder to anhydrous ethanol, control the solid-liquid ratio of the perilla seed powder to anhydrous ethanol to be 1:8, shake evenly and soak for 25-35 minutes;

[0026] 6.3) Preheating the soaked perilla seed sample in a 45-55° C. water bath for 8-11 minutes, then turning on an ultrasonic extractor and performing ultrasonic extraction at 300-350 W ultrasonic power for 25-35 minutes. After the ultrasonic extraction, centrifuging at 3800-4000 rpm for 9-13 minutes to obtain an extract;

[0027] 6.4) The extract is placed in a rotary evaporator and evaporated to dryness, and the drying temperature is controlled at 45-55° C. to obtain a perilla seed extract.

[0028] Furthermore, the calcium supplement is any one of calcium carbonate, calcium phosphate, calcium lactate, calcium gluconate, and amino acid chelated calcium.

[0029] The second object of the present invention is to provide a method for preparing the above composition, which comprises the following steps:

[0030] 8.1) taking bitter melon extract, garcinia cambogia extract, green tea extract and perilla seed extract respectively by weight, and mixing them evenly to form a basic extract mixture;

[0031] 8.2) mixing oat fiber with water, wherein the amount of water is 1.5-2.1 times the weight of the oat fiber, to form oat fiber paste;

[0032] 8.3) taking whey protein powder, flaxseed oil and calcium supplement according to weight, and adding them to the oat fiber paste, stirring while adding to ensure uniform dispersion, to obtain a mixture;

[0033] 8.4) slowly adding the basic extract mixture obtained in step 1 to the mixture obtained in step 3, and continuing to stir until completely uniform to obtain a final mixture;

[0034] 8.5) The final mixture is placed in a vacuum dryer, heated at 50-60°C for 60-120 minutes under atmospheric pressure, then the temperature is reduced to 40-45°C, and the drying is continued at a pressure of 1.5 kPa for 90-150 minutes, and finally the drying is completed by heating at 55-60°C for 60 minutes under a pressure of 0.2-0.3 kPa. The solid obtained by drying is crushed into powder, and sieved through 200-300 mesh to obtain the target product.

[0035] The third object of the present invention is to provide the use of the above composition in preparing food with weight loss effect.

[0036] The advantages of the present invention compared with the prior art are:

[0037] Bitter melon extract: Contains cucurbitane-type triterpenoid compounds, which act as glucose uptake promoters, glucose transporter 4 (GLUT4) upper membrane agonists and adenosine monophosphate activated protein kinase (AMPK) activators. It has the effects of regulating blood sugar, reducing body fat and fatty liver, and lowering blood lipids. It can also effectively inhibit the inflammatory response of various organs in the body and prevent the occurrence of chronic diseases.

[0038] Garcinia Cambogia Extract: Contains hydroxycitric acid (HCA), which acts as an inhibitor of ATP-citrate lyase. It can inhibit the synthesis of fatty acids, promote fat consumption, reduce body fat and blood lipids, and assist in weight management.

[0039] Oat fiber: Rich in lipase inhibitors and amylase inhibitors, it can effectively inhibit the absorption of fat in the digestive tract and promote the slowing down of glucose absorption. It has significant blood sugar lowering and weight loss functions and significantly improves intestinal health.

[0040] Whey protein powder: Contains all the essential amino acids needed by the human body, and contains immunoglobulin and lactoferrin to enhance immunity. It can effectively increase the basal metabolic rate and promote physical health.

[0041] Flaxseed oil: Rich in omega-3 fatty acids, vitamin E and various minerals, it plays an important role in cardiovascular health, helps lower cholesterol and improve cardiovascular health.

[0042] Green tea extract: Contains high concentrations of catechins and EGCG. It is processed by phospholipid complex technology, making it easier for the human body to absorb, improve metabolism, and has the effects of weight loss and lowering blood sugar.

[0043] Calcium supplements: Using calcium carbonate, calcium phosphate, calcium lactate, calcium gluconate, amino acid chelated calcium, etc. as calcium sources helps maintain bone health and promotes calcium absorption and utilization.

[0044] Perilla seed extract: rich in unsaturated fatty acids and antioxidants, it has anti-inflammatory and lipid-regulating effects, helps regulate body metabolism and promotes health.

[0045] The synergistic effects of the above raw materials are mainly manifested as follows:

[0046] 1) Enhance fat metabolism: Bitter melon extract, Garcinia cambogia extract and green tea extract work together to promote fat oxidation and reduce fat synthesis through different mechanisms;

[0047] 2) Improve satiety: Oat fiber and whey protein powder work together to increase satiety, helping to reduce total calorie intake;

[0048] 3) Support muscle health: Whey protein powder and calcium supplements work together to support muscle repair and growth and increase basal metabolic rate;

[0049] 4) Enhance antioxidant capacity: Green tea extract, flaxseed oil and perilla seed extract are rich in antioxidant ingredients, which together enhance the body's antioxidant defense system, improve the body's immune capacity and reduce oxidative stress.

[0050] The composition of the present invention can be used to prepare foods with weight loss effects, such as meal replacement powders, nutrition bars, etc. Its natural ingredients and synergistic mechanism of action make it an ideal supplement to a fat-reducing diet, helping to promote healthy fat loss, increase metabolic rate, and maintain overall health. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1is a comparison chart of the average final weights of mice in each group in Example 2 of the present invention;

[0052] Figure 2 It is a comparison chart of the average fat index of mice in each group in Example 2 of the present invention. DETAILED DESCRIPTION

[0053] The fat-reducing nutritional composition for enhancing metabolism and the preparation method thereof of the present invention are further described in detail below in conjunction with the embodiments.

[0054] Example 1

[0055] A fat-reducing nutritional composition for improving metabolism, the composition comprising the following components by weight: 17 parts of bitter melon extract, 23 parts of garcinia cambogia extract, 15 parts of oat fiber, 20 parts of whey protein powder, 8 parts of flaxseed oil, 10 parts of green tea extract, 12 parts of calcium supplement, and 17 parts of perilla seed extract;

[0056] The preparation method of the composition comprises the following steps:

[0057] Step 1) taking bitter melon extract, garcinia cambogia extract, green tea extract and perilla seed extract respectively by weight, and mixing them evenly to form a basic extract mixture;

[0058] Step 2) mixing the oat fiber with water, wherein the amount of water is 1.7 times the weight of the oat fiber, to form a paste of oat fiber;

[0059] Among them, oat fiber can absorb water and swell to form a sticky texture when it comes into contact with water, which provides a stable basic structure for subsequent additives;

[0060] Step 3) taking whey protein powder, flaxseed oil and calcium supplement by weight, and adding them to the oat fiber paste, stirring while adding to ensure uniform dispersion, to obtain a mixture;

[0061] Among them, first forming oat fiber paste, and then gradually adding whey protein powder, flaxseed oil and calcium supplements can ensure that the ingredients are evenly dispersed in the mixture to avoid agglomeration or precipitation;

[0062] Step 4) slowly adding the basic extract mixture obtained in step 1 to the mixture obtained in step 3, and continuing to stir until completely uniform to obtain a final mixture;

[0063] Step 5) placing the final mixture in a vacuum dryer, heating at 50-60° C. for 60-120 minutes at atmospheric pressure, then lowering the temperature to 40-45° C., and continuing to dry at a pressure of 1.5 kPa for 90-150 minutes, and finally heating at a pressure of 0.2-0.3 kPa at a controlled temperature of 55-60° C. for 60 minutes to complete drying, crushing the dried solid into a powder, and sieving through 200-300 mesh to obtain the target product.

[0064] Comparative Example 1

[0065] The preparation method of the bitter melon extract comprises the following steps:

[0066] Step 1) removing seeds from fresh bitter melon, slicing, drying at 60-100° C. for 60-120 minutes to remove moisture, and then crushing into bitter melon particles with a particle size of 0.2-0.5 mm;

[0067] Step 2) placing the obtained bitter melon particles into an extraction container, adding the bitter melon particles to anhydrous ethanol at a solid-liquid ratio of 0.3-0.4 g / mL, heating and refluxing for extraction, the extraction temperature is 60-70° C., the extraction time is 120-180 minutes, after the extraction is completed, filtering, removing the filter residue, and obtaining an ethanol extract;

[0068] Step 3) The obtained ethanol extract is concentrated under reduced pressure and the pressure is controlled at 40-100 kPa to obtain a concentrated solution. Then, the concentrated solution is vacuum dried and the pressure is controlled at 10 kPa to 50 kPa and the drying temperature is 50-80° C. to obtain a powdered bitter melon extract.

[0069] The preparation method of the garcinia cambogia extract comprises the following steps:

[0070] Step 1) selecting high-quality garcinia cambogia and washing it, and then crushing the garcinia cambogia to obtain garcinia cambogia tissue powder;

[0071] Step 2) Add the garcinia cambogia powder to an extraction tank, add water according to 6-8 times the weight of the raw material, heat to 90-95°C, and extract for 120 minutes. After filtering, add the same proportion of water to the residue and continue to extract for 120 minutes, and combine the two extracts;

[0072] Step 3) The combined extract is pumped into a single-effect concentrator for concentration, the vacuum degree is controlled at 60-80 kPa, the concentration temperature is 60-80° C., the concentrated extract is spray-dried, the inlet air temperature is controlled at 150-165° C., the outlet air temperature is controlled at 65-85° C., the temperature in the tower is controlled at 75-90° C., and the negative pressure is controlled at 0.01-0.018 kPa to obtain a dry garcinia cambogia extract powder, which can be sieved to obtain a powdered garcinia cambogia extract.

[0073] The preparation method of the green tea extract comprises the following steps:

[0074] Step 1) selecting dried green tea as raw material and crushing it to obtain green tea powder;

[0075] Step 2) weighing green tea powder, adding it to 70% edible alcohol solution, controlling the solid-liquid ratio of green tea powder to edible alcohol solution to be 1:12, and mixing evenly to obtain a mixed solution;

[0076] Step 3) placing the mixed solution in an ultrasonic extraction device, controlling the ultrasonic extraction power to 300-320W, the extraction temperature to 40-50°C, and the extraction time to 50-70 minutes. After the extraction is completed, filtering the solution to remove the tea residue to obtain an extract;

[0077] Step 4) The obtained extract is centrifuged at a speed of 7000-9000 r / min for 10-20 minutes to obtain a supernatant, and the supernatant is concentrated and then vacuum dried at a controlled pressure of 8-21 kPa and a drying temperature of 30-60° C. to obtain a green tea powder extract.

[0078] The bitter melon extract and the garcinia cambogia extract were mixed in a ratio of 1:1 to obtain a comparison sample No. 1;

[0079] Mix the bitter melon extract and the green tea extract in a ratio of 1:1 to obtain a second comparative sample;

[0080] The garcinia cambogia extract and the green tea extract were mixed in a ratio of 1:1 to obtain comparison sample No. 3.

[0081] Example 2: Weight loss and lipid-lowering effects on obese mice

[0082] Test object: Products obtained from Examples 1-5 of the present invention

[0083] Experimental method: 100 SPF Kunming male mice weighing 20-25g were selected. After one week of adaptive feeding, the mice were randomly divided into a normal group and a modeling group. The normal group had 20 mice, which were fed with conventional feed, wherein the conventional feed formula was 19% rice flour, 29% bran, 7% calcium powder, 0.6% salt, 0.4% trace elements, 24% wheat flour, 8% fish bone powder, and 12% bean cake; the modeling group had 80 mice, which were fed with high-fat feed, wherein the high-fat feed formula was 15% rice flour, 25% bran, 5% calcium powder, 10% bean cake, 25% sucrose, 17% lard, and 3% cholesterol;

[0084] The experimental animals were fed freely every day for 3 consecutive weeks to complete the modeling. Then, 50 high-fat mice were selected from the modeling group according to their body weight and divided into the experimental group, comparison group 1, comparison group 2, comparison group 3 and comparison group 4; 10 mice were selected from the normal group according to their body weight as the normal group.

[0085] The normal group, experimental group, comparison group 1, comparison group 2, comparison group 3 and comparison group 4 were tested for 8 weeks, among which:

[0086] The normal group and the 4 control groups were fed 100% conventional feed;

[0087] The experimental group used 90% conventional feed + 10% product of Example 1;

[0088] Comparative group 1 used 90% conventional feed + 10% No. 1 comparative sample;

[0089] The comparison group 2 used 90% conventional feed + 10% comparison sample No. 2;

[0090] The comparison group 3 used 90% conventional feed + 10% No. 3 comparison sample;

[0091] After the 8-week feeding trial, statistical analysis was performed, including the following values:

[0092] 1) Body weight: Weigh and record the body weight of mice in each group, and calculate the average body weight of each group;

[0093] 2) Blood test: Blood was collected from the eyelids of mice in each group, and the upper serum was separated after centrifugation. The serum total cholesterol (TC), triglyceride (TG) and free fatty acid (FFA) values ​​were measured, and the average TC, TG and FFA values ​​of mice in each group were calculated;

[0094] 3) Determination of fat index: After the experiment, the experimental mice in each group were killed, the fat around the liver was removed and weighed, and the fat index was calculated; the calculation formula of the fat index is:

[0095] Fat index = fat weight / body weight*100%

[0096] After statistical processing, the results are summarized in the following table, and the average final weight and the average fat index in the table below are plotted as follows: Figure 1 , Figure 2 ,in Figure 1 is a comparison chart of the final weight average values ​​in Example 2, Figure 2 This is a comparison chart of the average values ​​of fat index in Example 2:

[0097]

[0098] Table 1 Experimental data summary

[0099] Through the above table, combined with Figure 1 and Figure 2 It can be seen that the normal group was fed with conventional feed during the modeling and fat-reducing feeding experiments, and its various indicators were used as the comparison values ​​between the experimental group and the comparison groups 1-4. Among them, the comparison group 4 was composed of high-fat mice obtained after modeling, and no drugs that promoted fat reduction were used in the feeding experiment. Its various values ​​were significantly higher than those of the normal group;

[0100] Comparison group 1 used 90% conventional feed + 10% No. 1 comparison sample, comparison group 2 used 90% conventional feed + 10% No. 2 comparison sample, comparison group 3 used 90% conventional feed + 10% No. 3 comparison sample. After the feeding experiment, the test values ​​of the comparison group 1 were lower than those of comparison group 4, but significantly higher than those of the normal group.

[0101] The experimental group was fed with 90% conventional feed + 10% product of Example 1. After the feeding experiment, the test values ​​of the experimental group were significantly lower than those of the control group 4 and close to those of the normal group. This proves that the fat-reducing nutritional composition provided by the present invention, after the combined action of bitter melon extract, garcinia cambogia extract and green tea extract, has a fat-reducing function significantly higher than the combination of any two of the bitter melon extract, garcinia cambogia extract and green tea extract.

[0102] At the same time, in the fat-reducing nutritional composition provided by the present invention, oat fiber and whey protein powder jointly increase satiety, which helps to reduce total calorie intake; and whey protein powder and calcium supplements work together to support muscle repair and growth and increase basal metabolic rate; at the same time, green tea extract, flaxseed oil and perilla seed extract are rich in antioxidant ingredients, which can enhance the body's antioxidant defense system, improve the body's immune ability, and reduce oxidative stress.

[0103] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A fat-reducing nutritional composition for improving metabolism, characterized in that: The composition comprises the following components by weight: 13-21 parts of bitter melon extract, 15-31 parts of garcinia cambogia extract, 13-17 parts of oat fiber, 17-23 parts of whey protein powder, 7-9 parts of flaxseed oil, 6-14 parts of green tea extract, 9-15 parts of calcium supplement and 15-19 parts of perilla seed extract.

2. The composition according to claim 1, characterized in that The composition comprises the following components by weight: 17 parts of bitter melon extract, 23 parts of garcinia cambogia extract, 15 parts of oat fiber, 20 parts of whey protein powder, 8 parts of flaxseed oil, 10 parts of green tea extract, 12 parts of calcium supplement, and 17 parts of perilla seed extract.

3. The composition according to claim 1 or 2, characterized in that The preparation method of the bitter melon extract comprises the following steps: 3.1) removing seeds from fresh bitter melon, slicing, drying at 60-100° C. for 60-120 minutes to remove moisture, and then crushing into bitter melon particles with a particle size of 0.2-0.5 mm; 3.2) placing the obtained bitter melon particles into an extraction container, adding the bitter melon particles to anhydrous ethanol at a solid-liquid ratio of 0.3-0.4 g / mL, heating and refluxing for extraction, the extraction temperature is 60-70° C., the extraction time is 120-180 minutes, after the extraction is completed, filtering, removing the filter residue, and obtaining an ethanol extract; 3.3) The obtained ethanol extract is concentrated under reduced pressure, and the pressure is controlled at 40-100 kPa to obtain a concentrated solution. Then, the concentrated solution is vacuum dried, and the pressure is controlled at 10 kPa to 50 kPa and the drying temperature is 50-80° C. to obtain a powdered bitter melon extract.

4. The composition according to claim 1 or 2, characterized in that The preparation method of the garcinia cambogia extract comprises the following steps: 4.1) Selecting high-quality garcinia cambogia and washing it, and then crushing the garcinia cambogia to obtain garcinia cambogia tissue powder; 4.2) Add the garcinia cambogia powder to the extraction tank, add water according to 6-8 times the weight of the raw material, heat to 90-95°C, keep warm and extract for 120 minutes, filter, add the same proportion of water to the residue and continue to extract for 120 minutes, and combine the two extracts; 4.3) The combined extract is pumped into a single-effect concentrator for concentration, the vacuum degree is controlled at 60-80 kPa, the concentration temperature is 60-80° C., the concentrated extract is spray-dried, the inlet air temperature is controlled at 150-165° C., the outlet air temperature is controlled at 65-85° C., the temperature in the tower is controlled at 75-90° C., and the negative pressure is controlled at 0.01-0.018 kPa to obtain a dry garcinia cambogia extract powder, which can be sieved to obtain a powdered garcinia cambogia extract.

5. The composition according to claim 1 or 2, characterized in that The preparation method of the green tea extract comprises the following steps: 5.1) Selecting dried green tea as raw material and crushing it to obtain green tea powder; 5.2) Weigh green tea powder, add it to 70% edible alcohol solution, control the solid-liquid ratio of green tea powder to edible alcohol solution to be 1:12, mix well, and obtain a mixed solution; 5.3) placing the mixed solution in an ultrasonic extraction device, controlling the ultrasonic extraction power to 300-320W, the extraction temperature to 40-50°C, and the extraction time to 50-70 minutes. After the extraction is completed, filtering the solution to remove the tea residue to obtain an extract; 5.4) The obtained extract is centrifuged at a speed of 7000-9000 r / min for 10-20 minutes to obtain a supernatant. The supernatant is concentrated and then vacuum dried at a controlled pressure of 8-21 kPa and a drying temperature of 30-60° C. to obtain a green tea powder extract.

6. The composition according to claim 1 or 2, characterized in that The preparation method of the perilla seed extract comprises the following steps: 6.1) Take perilla seeds, crush them, and sieve them to obtain 40-60 mesh perilla seed powder; 6.2) Add the perilla seed powder to anhydrous ethanol, control the solid-liquid ratio of the perilla seed powder to anhydrous ethanol to be 1:8, shake evenly and soak for 25-35 minutes; 6.3) Preheating the soaked perilla seed sample in a 45-55° C. water bath for 8-11 minutes, then turning on an ultrasonic extractor and performing ultrasonic extraction at 300-350 W ultrasonic power for 25-35 minutes. After the ultrasonic extraction, centrifuging at 3800-4000 rpm for 9-13 minutes to obtain an extract; 6.4) The extract is placed in a rotary evaporator and evaporated to dryness, and the drying temperature is controlled at 45-55° C. to obtain a perilla seed extract.

7. The composition according to claim 1 or 2, characterized in that The calcium supplement is any one of calcium carbonate, calcium phosphate, calcium lactate, calcium gluconate, and amino acid chelated calcium.

8. The method for preparing the composition according to claim 1 or 2, characterized in that: The following steps are involved: 8.1) taking bitter melon extract, garcinia cambogia extract, green tea extract and perilla seed extract respectively by weight, and mixing them evenly to form a basic extract mixture; 8.2) mixing oat fiber with water, wherein the amount of water is 1.5-2.1 times the weight of the oat fiber, to form oat fiber paste; 8.3) taking whey protein powder, flaxseed oil and calcium supplement according to weight, and adding them to the oat fiber paste, stirring while adding to ensure uniform dispersion, to obtain a mixture; 8.4) slowly adding the basic extract mixture obtained in step 1 to the mixture obtained in step 3, and continuing to stir until completely uniform to obtain a final mixture; 8.5) The final mixture is placed in a vacuum dryer, heated at 50-60°C for 60-120 minutes under atmospheric pressure, then the temperature is reduced to 40-45°C, and the drying is continued at a pressure of 1.5 kPa for 90-150 minutes, and finally the drying is completed by heating at 55-60°C for 60 minutes under a pressure of 0.2-0.3 kPa. The solid obtained by drying is crushed into powder, and sieved through 200-300 mesh to obtain the target product.

9. Use of the composition according to any one of claims 1 or 2 in preparing food with weight loss effect.

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