Powder electuary containing polydextrose and preparation method of powder electuary

Abstract

The invention relates to a polydextrose-containing powder electuary and a preparation method thereof, and belongs to the technical field of functional foods. The formula of the instant granules comprises 30 to 50 parts of polydextrose powder, 5 to 15 parts of camellia flower extract, 10 to 30 parts of corn starch, 0.1 to 1 part of ergosterol, 1 to 5 parts of konjac glucomannan and 10 to 20 parts of deionized water. The camellia extract is prepared through a specific process, and the specific process comprises the steps of drying, grinding, ethanol ultrasonic extraction, microwave extraction, freeze drying and the like, so that the extract with high purity and fine granularity is obtained. The preparation method comprises the following steps: uniformly mixing the raw materials, adding the deionized water and the camellia extract, stirring, homogenizing, pre-freezing, freeze-drying and the like. Homogenization treatment and pre-freezing treatment parameters are optimized to ensure the uniformity and stability of the product. The finally obtained powder electuary is uniform in particle size, has good solubility and taste, and is suitable for being used as a nutritional supplement or functional food.

Description

Technical Field

[0001] The invention belongs to the technical field of functional foods and relates to a polydextrose powder granule and a preparation method thereof. Background Art

[0002] As a water-soluble dietary fiber, polydextrose has been widely used in the food industry due to its good water retention and stability, especially in powdered granules. It not only provides a sense of fullness but also promotes intestinal health.

[0003] However, a single polydextrose powder may not meet the diverse needs of consumers in terms of taste and nutritional value. Therefore, the development of a composite powder that combines multiple natural ingredients has become a research hotspot. As a traditional medicinal plant, camellia extracts are rich in a variety of active ingredients, such as polyphenols and flavonoids, and have multiple biological activities such as antioxidant and anti-inflammatory properties. It is an ideal choice for improving the nutritional value and health benefits of products.

[0004] At present, although there are some powdered granules containing polydextrose and other natural ingredients on the market, there are still deficiencies in the preparation process, ingredient ratio and product quality control. Therefore, the present invention aims to provide a new powdered granule containing polydextrose and a preparation method thereof, and ensure the high quality, high nutritional value and good taste of the product by optimizing the preparation process of camellia extract and the preparation process of composite powdered granules to meet the health needs of consumers. Summary of the invention

[0005] The object of the present invention is to provide a polydextrose-containing powder granule and a preparation method thereof, which has the characteristics of uniform powder particles.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A polydextrose powder granule, the powder granule has the following formula: by weight, 30-50 parts of polydextrose powder, 5-15 parts of camellia extract, 10-30 parts of corn starch, 0.1-1 part of ergosterol, 1-5 parts of konjac gum, and 10-20 parts of deionized water.

[0008] The camellia extract is prepared by using ethanol ultrasonic extraction combined with microwave-assisted mixed solvent extraction.

[0009] Furthermore, the preparation method of the camellia extract is as follows:

[0010] S2.1: Wash the camellia with deionized water, dry at 80°C, put the dried camellia into a ball mill for grinding at a speed of 500 r / min, and obtain pretreated camellia powder;

[0011] S2.2: Disperse the camellia powder in an ethanol solution with a mass fraction of 30 - 50%, with a solid-liquid ratio of 1:5 g / ml. Raise the temperature to 80 - 90°C, keep it at a constant temperature and then ultrasonicate for 0.5 h, and filter to obtain filtrate A and filter residue;

[0012] S2.3: Disperse the filter residue in a mixed solvent of ethanol and ethyl acetate, and perform microwave extraction in a microwave reactor with a microwave power of 350 W and a microwave extraction time of 200 s. Filter, and perform rotary evaporation on the filtrate at a rotary evaporation temperature of 60°C to obtain extract B;

[0013] S2.4: Dissolve extract B in filtrate A prepared in S2, freeze it at -40°C for 30 min, and then vacuum dry it using a freeze dryer at a vacuum drying temperature of -70°C for 2 h to obtain a freeze-dried solid. After pulverizing and grinding, obtain the camellia extract.

[0014] Further, the particle size of the camellia powder in S2.1 is 300 mesh.

[0015] Further, the heating rate in S2.2 is 3°C / min.

[0016] Further, the mixed solvent of ethanol and ethyl acetate in S2.3 is prepared by mixing in a volume ratio of (1 - 3):1.

[0017] Further, the particle size of the camellia extract obtained by grinding in S2.4 is 500 mesh.

[0018] A preparation method of a powder granule containing polydextrose powder. The specific process of the preparation method of the powder granule is as follows.

[0019] S7.1: Mix the polydextrose powder, corn starch, konjac gum, and ergosterol evenly, and stir in a mixing blender at a rotation speed of 300 r / min for 10 - 20 min to obtain a uniform mixture C;

[0020] S7.2: Add deionized water to the mixture, continue to stir at a rotation speed of 300 r / min for 10 - 20 min to obtain mixture D, then add the camellia extract, increase the rotation speed to 400 r / min, and continue to stir for 15 - 30 min to obtain mixture E;

[0021] S7.3: Transfer mixture E to a homogenizer for 1 - 3 times of homogenization treatment. Spread the homogenized mixture flat with a thickness controlled at 5 - 10 mm, and perform pre-freezing treatment;

[0022] S7.4: Transfer the pre-frozen mixture to a freeze dryer for freeze-drying. Under vacuum conditions, dry at -20°C for 24 hours. After freeze-drying is completed, pulverize and grind, and sieve to obtain the powder granule.

[0023] Furthermore, the homogenization treatment parameters in S7.3 are a pressure of 20 - 50 MPa, a temperature of 20 - 30°C, and a treatment duration of 10 - 20 minutes.

[0024] Furthermore, the pre-freezing treatment parameters in S7.3 are a temperature of -60 to -40°C and a duration of 2 - 6 hours.

[0025] Furthermore, the particle size of the powder granule prepared in S7.4 is 0.5 mm.

[0026] The granule formula of the present invention contains key components such as polydextrose powder, camellia extract, corn starch, ergosterol, konjac gum, and deionized water. Each component acts on the human body together to form a synergistic effect, not only enhancing the overall health benefits but also bringing a good taste experience.

[0027] Polydextrose is a high-fiber, low-calorie functional carbohydrate. It can form a gel-like substance in the intestine, increase the fecal volume, promote intestinal peristalsis, effectively improve constipation, and maintain intestinal health. In addition, polydextrose can also slow down the absorption rate of sugar in food, helping to regulate blood sugar levels.

[0028] The camellia extract is rich in active ingredients such as tea polyphenols and flavonoids. These ingredients have strong antioxidant capabilities, can effectively scavenge free radicals in the body, reduce the damage of oxidative stress to cells, and reduce the negative impact of chronic inflammation on metabolism. At the same time, tea polyphenols also have a certain anti-inflammatory effect, which can reduce the body's inflammatory response and promote the body's recovery and repair. The triterpenoids in camellia can reduce the decomposition of dietary fat by inhibiting the activity of pancreatic lipase and inhibit fat absorption. In addition, the camellia extract can also improve the skin condition, reduce the formation of age spots, and make the skin smoother and more delicate, with significant beauty effects.

[0029] Corn starch is easy to digest and absorb, can quickly provide energy for the human body to meet the needs of daily activities. At the same time, it can also regulate blood sugar levels and avoid blood sugar fluctuations caused by too rapid sugar intake. In terms of taste, the addition of corn starch makes the granule smoother and improves the overall taste experience.

[0030] Ergosterol is a precursor of vitamin D2, which can be converted into vitamin D2 in the human body, promote the absorption and utilization of calcium, and is crucial for bone health. At the same time, vitamin D2 can also enhance the activity of immune cells, improve the body's immunity, and combat the invasion of foreign pathogens. Therefore, the addition of ergosterol not only enhances the nutritional value of the granule but also improves its health benefits.

[0031] Konjac gum can absorb water and expand in the intestine to form a gelatinous substance, stimulate intestinal peristalsis, promote defecation, and effectively relieve constipation. At the same time, it can combine with cholesterol in the intestine, reduce its absorption, help lower blood lipid levels, and prevent cardiovascular diseases. In addition, konjac gum can increase satiety, reduce food intake, and play a positive role in weight control.

[0032] In terms of the synergistic mechanism, the combination of polydextrose powder and konjac gum greatly promotes intestinal health. By increasing fecal volume and stimulating intestinal peristalsis, it effectively improves constipation. At the same time, they can also slow down the absorption rate of sugar, regulate blood sugar levels, and control weight. In addition, konjac gum has strong water absorption and can absorb and retain a large amount of water. Although polydextrose has weak water absorption, it can act together with konjac gum to form a more effective water retention system. This synergistic effect helps prevent water loss during storage and transportation of the product, maintaining the moisture and taste of the product. Konjac gum has emulsifying properties and can stabilize the oil-water interface in food, preventing oil-water separation. Although polydextrose has weak emulsifying properties, it can act together with konjac gum to enhance the emulsifying stability of the system. This synergistic effect helps maintain the uniformity and stability of the product and improve the quality of the product.

[0033] Polydextrose can delay the absorption of sugar and lower the postprandial blood sugar level. And corn starch, as a carbohydrate, its appropriate intake can maintain blood sugar stability. The two work together to help regulate blood sugar levels and are suitable for diabetics to consume;

[0034] After ergosterol is converted into vitamin D2, it can enhance the activity and number of immune cells. At the same time, polydextrose can also stimulate the phagocytic activity of immune cells and improve the body's resistance. The flavonoid compounds in the camellia extract also have certain anti-inflammatory and immune regulatory effects. These components work together to help enhance overall immunity.

[0035] The preparation steps of the camellia extract of the present invention maximize the extraction and retention of active ingredients in camellia while ensuring the purity and stability of the final product. First, the camellia powder is dispersed in an ethanol solution with an appropriate mass fraction, and the heating rate and ultrasonic time are strictly controlled, effectively promoting the release of active ingredients. In addition, the present invention uses a mixture of ethanol and ethyl acetate and mixes them in a specific volume ratio of (1-3):1, which brings significant advantages to the extraction process. Ethanol, as a polar solvent, can dissolve polar components in camellia; while ethyl acetate, as a non-polar solvent, has a strong ability to dissolve non-polar components. When mixed in this ratio, it not only maintains a moderate polarity of the solvent system but also achieves a comprehensive extraction of different types of active ingredients in camellia. The selection of this ratio avoids the problems of loss of non-polar components caused by too strong solvent polarity or ineffective dissolution of polar components due to too weak polarity. If the ratio of ethanol to ethyl acetate is higher than (1-3):1, that is, the ethanol content is too high, it may lead to too strong solvent polarity, which is not conducive to the extraction of non-polar components; on the contrary, if the ratio is lower than this range, the solvent polarity may be too weak, affecting the dissolution of polar components. Therefore, the selection of this ratio not only optimizes the extraction efficiency but also ensures the comprehensiveness and quality of the product.

[0036] First, the present invention evenly mixes key components such as polydextrose powder, corn starch, konjac gum, and ergosterol through a mixing blender, ensuring the uniformity and stability of the product components. The precise control of the rotation speed and time during the stirring process further improves the mixing efficiency and lays a solid foundation for subsequent processing steps. After adding deionized water and camellia extract, increasing the stirring speed not only promotes the full fusion of each component but also ensures the uniform distribution of active ingredients in the camellia extract, enhancing the nutritional value and taste of the product; the application of the homogenization treatment step effectively improves the texture and stability of the mixture through high-pressure and appropriate temperature treatment, making the product more delicate and uniform, while enhancing its solubility and taste; the pre-freezing treatment is prepared for subsequent freeze-drying treatment through strict temperature and time control, ensuring the freeze-drying efficiency and product quality; the freeze-drying treatment is carried out under vacuum conditions, effectively avoiding product oxidation and deterioration, while retaining the original flavor and nutritional components of the product. The long-term low-temperature drying ensures precise control of the product moisture content, enhancing the stability and shelf life of the product. Finally, through crushing, grinding, and sieving, a powder granule with uniform particle size is obtained, which is not only convenient for consumers to brew and drink but also ensures the delicate and uniform taste of the product. Detailed implementation mode

[0037] To further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following, in combination with embodiments, details the specific implementation mode, structure, characteristics, and their effects of the present invention as follows.

[0038] Example 1

[0039] A polydextrose powder granule, the formula of the powder granule is as follows, by mass fraction, 40 parts of polydextrose powder, 10 parts of camellia extract, 20 parts of corn starch, 0.5 part of ergosterol, 3 parts of konjac gum, and 15 parts of deionized water.

[0040] The preparation method of the camellia extract is as follows,

[0041] S2.1: Wash the camellia with deionized water, dry it at 80 °C, put the dried camellia into a ball mill for grinding, the rotation speed of the ball mill is 500 r / min, and obtain the pretreated camellia powder, and the particle size of the camellia powder is 300 mesh;

[0042] S2.2: Disperse the camellia powder in an ethanol solution with a mass fraction of 30%, the solid-liquid ratio is 1:5 g / ml, raise the temperature to 80 °C, the heating rate is 3 °C / min, keep the temperature constant and then ultrasonicate for 0.5 h, filter to obtain filtrate A and filter residue;

[0043] S2.3: Disperse the filter residue in a mixed solvent of ethanol and ethyl acetate, the mixed solvent of ethanol and ethyl acetate is mixed in a volume ratio of 2:1, carry out microwave extraction in a microwave reactor, the microwave power is 350 W, the microwave extraction time is 200 s, filter, and carry out rotary evaporation on the filtrate, the rotary evaporation temperature is 60 °C, and obtain extract B;

[0044] S2.4: Dissolve extract B in filtrate A prepared in S2, freeze it at -40 °C for 30 min, then vacuum dry it with a freeze dryer, the vacuum drying temperature is -70 °C, and the drying time is 2 h to obtain a freeze-dried solid, which is pulverized and ground to obtain the camellia extract, and the particle size of the ground camellia extract is 500 mesh.

[0045] The specific process of the preparation method of the powder granule is as follows,

[0046] S7.1: Mix the polydextrose powder, corn starch, konjac gum and ergosterol evenly, stir in a mixing blender at a rotation speed of 300 r / min for 20 min to obtain a uniform mixture C;

[0047] S7.2: Add deionized water to the mixture, continue to stir at a rotation speed of 300 r / min for 20 min to obtain mixture D, then add the camellia extract, raise the rotation speed to 400 r / min, and continue to stir for 20 min to obtain mixture E;

[0048] S7.3: Transfer mixture E to a homogenizer for three homogenization treatments. The homogenization parameters are a pressure of 20 MPa, a temperature of 30 °C, and a treatment duration of 20 min. Spread the homogenized mixture flat with a thickness controlled at 7.5 mm and conduct a pre-freezing treatment. The pre-freezing parameters are a temperature of -60 °C and a duration of 4 h.

[0049] S7.4: Transfer the pre-frozen mixture to a freeze dryer for freeze-drying. Under vacuum conditions, dry at -20 °C for 24 h. After freeze-drying is completed, crush, grind, and sieve to obtain the powder granule. The particle size of the prepared powder granule is 0.5 mm.

[0050] Example 2

[0051] A powder granule containing polydextrose. The formula of the powder granule is as follows, by mass fraction: 30 parts of polydextrose powder, 5 parts of camellia extract, 10 parts of corn starch, 0.1 part of ergosterol, 1 part of konjac gum, and 10 parts of deionized water.

[0052] The preparation method of the camellia extract is as follows.

[0053] S2.1: Wash the camellia with deionized water and dry at 80 °C. Put the dried camellia into a ball mill for grinding. The rotation speed of the ball mill is 500 r / min to obtain the pre-treated camellia powder. The particle size of the camellia powder is 300 mesh.

[0054] S2.2: Disperse the camellia powder in an ethanol solution with a mass fraction of 30%. The solid-liquid ratio is 1:5 g / ml. Raise the temperature to 90 °C at a heating rate of 3 °C / min. After constant temperature, ultrasonicate for 0.5 h and filter to obtain filtrate A and filter residue.

[0055] S2.3: Disperse the filter residue in a mixed solvent of ethanol and ethyl acetate. The mixed solvent of ethanol and ethyl acetate is mixed in a volume ratio of 1:1. Conduct microwave extraction in a microwave reactor with a microwave power of 350 W and a microwave extraction time of 200 s. Filter and perform rotary evaporation on the filtrate at a rotary evaporation temperature of 60 °C to obtain extract B.

[0056] S2.4: Dissolve extract B in filtrate A prepared in S2. Freeze it at -40 °C for 30 min, and then use a freeze dryer for vacuum drying at a vacuum drying temperature of -70 °C and a drying duration of 2 h to obtain a freeze-dried solid. After crushing and grinding, obtain the camellia extract. The particle size of the ground camellia extract is 500 mesh.

[0057] The specific process of the preparation method of the powder granule is as follows.

[0058] S7.1: Mix the polydextrose powder, corn starch, konjac gum, and ergosterol evenly, and stir in a mixing blender at a speed of 300 r / min for 10 min to obtain a uniform mixture C.

[0059] S7.2: Add deionized water to the mixture, continue to stir at a speed of 300 r / min for 10 min to obtain mixture D, then add camellia extract, increase the speed to 400 r / min, and continue to stir for 15 min to obtain mixture E.

[0060] S7.3: Transfer mixture E to a homogenizer for one homogenization treatment. The homogenization treatment parameters are a pressure of 50 MPa, a temperature of 20 °C, and a treatment duration of 10 min. Spread the homogenized mixture flat with a thickness controlled at 5 mm, and perform a pre-freezing treatment. The pre-freezing treatment parameters are a temperature of -40 °C and a duration of 2 h.

[0061] S7.4: Transfer the pre-frozen mixture to a freeze dryer for freeze-drying treatment. Under vacuum conditions, dry at -20 °C for 24 h. After freeze-drying is completed, crush and grind, and sieve to obtain the powder granule. The particle size of the prepared powder granule is 0.5 mm.

[0062] Example 3

[0063] A powder granule containing polydextrose, and the formula of the powder granule is as follows. By mass, 50 parts of polydextrose powder, 15 parts of camellia extract, 30 parts of corn starch, 1 part of ergosterol, 5 parts of konjac gum, and 20 parts of deionized water.

[0064] The preparation method of the camellia extract is as follows.

[0065] S2.1: Wash the camellia with deionized water, dry at 80 °C, and put the dried camellia into a ball mill for grinding. The speed of the ball mill is 500 r / min to obtain pre-treated camellia powder with a particle size of 300 mesh.

[0066] S2.2: Disperse the camellia powder in an ethanol solution with a mass fraction of 50%, with a solid-liquid ratio of 1:5 g / ml. Raise the temperature to 90 °C at a heating rate of 3 °C / min, keep it at a constant temperature and then ultrasonicate for 0.5 h, and filter to obtain filtrate A and filter residue.

[0067] S2.3: Disperse the filter residue in a mixed solvent of ethanol and ethyl acetate. The mixed solvent of ethanol and ethyl acetate is mixed in a volume ratio of 3:1. Perform microwave extraction in a microwave reactor with a microwave power of 350 W and a microwave extraction time of 200 s. Filter, and perform rotary evaporation on the filtrate at a rotary evaporation temperature of 60 °C to obtain extract B.

[0068] S2.4: Dissolve extract B in filtrate A obtained in S2, freeze it at -40°C for 30 min, then use a freeze dryer for vacuum drying at a temperature of -70°C for 2 h to obtain a freeze-dried solid. After pulverizing and grinding, the camellia extract is obtained, and the particle size of the obtained camellia extract after grinding is 500 mesh.

[0069] The specific process for preparing the powder granule is as follows.

[0070] S7.1: Mix polydextrose powder, corn starch, konjac gum, and ergosterol evenly, and stir in a mixing blender at a speed of 300 r / min for 20 min to obtain a uniform mixture C.

[0071] S7.2: Add deionized water to the mixture, continue to stir at a speed of 300 r / min for 20 min to obtain mixture D, then add the camellia extract, increase the speed to 400 r / min, and continue to stir for 30 min to obtain mixture E.

[0072] S7.3: Transfer mixture E to a homogenizer for 3 times of homogenization treatment. The homogenization treatment parameters are a pressure of 50 MPa, a temperature of 20°C, and a treatment duration of 20 min. Spread the homogenized mixture flat with a thickness controlled at 10 mm, and conduct a pre-freezing treatment. The pre-freezing treatment parameters are a temperature of -60°C and a duration of 6 h.

[0073] S7.4: Transfer the pre-frozen mixture to a freeze dryer for freeze-drying treatment. Under vacuum conditions, dry at -20°C for 24 h. After freeze-drying is completed, pulverize, grind, and sieve to obtain the powder granule. The particle size of the obtained powder granule is 0.5 mm.

[0074] Comparative Example 1

[0075] In this comparative example, konjac gum is not added during the preparation process, and the remaining steps are the same as those in Example 1.

[0076] Comparative Example 2

[0077] In this comparative example, ergosterol is not added during the preparation process, and the remaining steps are the same as those in Example 1.

[0078] Comparative Example 3

[0079] In this comparative example, the camellia extract is not added during the preparation process, and the remaining steps are the same as those in Example 1.

[0080] Comparative Example 4

[0081] In this comparative example, the pre-freezing treatment is not carried out during the preparation process, and the remaining steps are the same as those in Example 1.

[0082] Comparative Example 5

[0083] In the preparation process of the camellia extract in this comparative example, ethanol and ethyl acetate were mixed at a volume ratio of 4:1, and the remaining steps were the same as those in Example 1.

[0084] Comparative Example 6

[0085] In the preparation process of the camellia extract in this comparative example, ethanol and ethyl acetate were mixed at a volume ratio of 1:2, and the remaining steps were the same as those in Example 1.

[0086] Comparative Example 7

[0087] In the preparation process of the camellia extract in this comparative example, ethyl acetate was replaced with deionized water, and the remaining steps were the same as those in Example 1.

[0088] The sensory requirements of the polydextrose powder granules prepared in Examples 1-3 and Comparative Examples 1-4 were detected. Referring to the standard GB 25541-2010, the test results are summarized in the following table.

[0089] Product Appearance Example 1 Off-white to cream color, with uniform powder Example 2 Off-white to cream color, with uniform powder Example 3 Off-white to cream color, with uniform powder Comparative Example 1 Off-white to cream color, with uniform powder Comparative Example 2 Off-white to cream color, with uniform powder Comparative Example 3 Off-white to cream color, with uniform powder Comparative Example 4 Off-white to cream color, with slightly granular powder

[0090] The performance of the polydextrose powder granules prepared in Example 1 and Comparative Examples 1-3, 5-7 was detected, and the difference in body weight of the mice before and after the experiment was detected.

[0091] Experimental animals: 4-week-old SPF-grade ICR mice, half male and half female, purchased from Beijing Speyford Biotechnology Co., Ltd., production license number SCXK(Jing)2024-001; certificate number: No. 110324241105392021; use license number: SYXK(Jin)2020-0006. They were raised in the clean animal room of Shanxi University of Traditional Chinese Medicine at a temperature of 20-24°C, relative humidity of 50%-70%, and a light-dark rhythm of 12h / 12h, with free access to food and water.

[0092] Experimental grouping: The ICR mice were adaptively fed for 7 days, with 10 mice in each group, half male and half female. The polydextrose powder granules prepared in the examples and comparative examples were respectively prepared into a medicament with a concentration of 3.9 g / kg using normal saline, and the medicament for the blank group was a solution prepared by dissolving polydextrose in normal saline at a concentration of 3.9 g / kg.

[0093] Test method: The administration time was 9:00 every day, the administration volume was 0.2 mL per mouse, once a day for 14 consecutive days. After 14 days, the body weight of each group of ICR mice was measured and compared with the body weight of the ICR mice before administration.

[0094] Before experiment (g) After experiment (g) Example 1 31.24±1.22 29.91±1.06 Comparative Example 1 31.54±1.37 31.13±1.12 Comparative Example 2 30.16±1.14 29.51±1.09 Comparative Example 3 30.57±1.30 29.92±1.24 Comparative Example 5 30.86±1.15 29.74±1.01 Comparative Example 6 31.42±1.41 30.43±1.28 Comparative Example 7 31.10±1.25 30.38±1.34 Blank group 31.65±1.35 32.14±1.82

[0095] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed as above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the disclosed technical content within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A polydextrose powder granule, characterized in that: The powder granule formula is as follows: by weight, 30 to 50 parts of polydextrose powder, 5 to 15 parts of camellia extract, 10 to 30 parts of corn starch, 0.1 to 1 part of ergosterol, 1 to 5 parts of konjac gum, and 10 to 20 parts of deionized water. The camellia extract is prepared by using ethanol ultrasonic extraction combined with microwave-assisted mixed solvent extraction.

2. A polydextrose powder granule according to claim 1, characterized in that: The preparation method of the camellia extract is as follows: S2.1: Wash the camellia with deionized water, dry at 80°C, put the dried camellia into a ball mill for grinding at a speed of 500 r / min to obtain pretreated camellia powder; S2.2: Disperse camellia powder in 30-50% ethanol solution with a solid-liquid ratio of 1:5 g / ml, raise the temperature to 80-90°C, maintain constant temperature and perform ultrasonic treatment for 0.5 h, filter, and obtain filtrate A and residue; S2.3: Disperse the filter residue in a mixed solvent of ethanol and ethyl acetate, perform microwave extraction in a microwave reactor, the microwave power is 350 W, the microwave extraction time is 200 s, filter, and perform rotary evaporation on the filtrate at a rotary evaporation temperature of 60° C. to obtain extract B; S2.4: The extract B is dissolved in the filtrate A obtained in S2, and the filtrate is frozen at -40°C for 30 min, and then vacuum dried using a freeze dryer at a vacuum drying temperature of -70°C for 2 h to obtain a freeze-dried solid, which is then crushed and ground to obtain the camellia extract.

3. A polydextrose powder granule according to claim 1, characterized in that: The particle size of the camellia powder in S2.1 is 300 meshes.

4. A polydextrose powder granule according to claim 1, characterized in that: The heating rate in S2.2 is 3°C / min.

5. The polydextrose powder granule according to claim 1, characterized in that: The mixed solvent of ethanol and ethyl acetate in S2.3 is prepared by mixing in a volume ratio of (1-3):

1.

6. The polydextrose powder granule according to claim 1, characterized in that: The particle size of the camellia extract obtained by grinding in S2.4 is 500 mesh.

7. A method for preparing a polydextrose powder granule, which is based on the polydextrose powder granule according to any one of claims 1 to 6, characterized in that: The specific process of the preparation method of the powder granules is as follows: S7.1: Mix polydextrose powder, corn starch, konjac gum and ergosterol uniformly, and stir in a mixer at a speed of 300 r / min for 10 to 20 min to obtain a uniform mixture C; S7.2: adding deionized water to the mixture, continuing to stir at a speed of 300 r / min for 10 to 20 min to obtain a mixture D, then adding the camellia extract, increasing the speed to 400 r / min, and continuing to stir for 15 to 30 min to obtain a mixture E; S7.3: Transfer the mixture E to a homogenizer and homogenize it 1 to 3 times, spread the homogenized mixture flat with a thickness of 5 to 10 mm, and pre-freeze it; S7.4: The pre-frozen mixture is transferred to a freeze dryer for freeze drying, and dried at -20°C under vacuum for 24 hours. After freeze drying, the mixture is crushed and ground, and sieved to obtain the powdered preparation.

8. The method for preparing a polydextrose powder granule according to claim 7, characterized in that: The homogenization treatment parameters in S7.3 are pressure 20-50 MPa, temperature 20-30° C., and treatment time 10-20 min.

9. The method for preparing a polydextrose powder granule according to claim 7, characterized in that: The pre-freezing treatment parameters in S7.3 are a temperature of -60 to -40°C and a duration of 2 to 6 hours.

10. The method for preparing a polydextrose powder granule according to claim 7, characterized in that: The particle size of the powder pellets prepared in S7.4 is 0.5 mm.