Medicinal and edible health tea and preparation method thereof

Abstract

The invention discloses medicinal and edible health-preserving tea and a preparation method thereof, and belongs to the technical field of medicinal and edible drinks. The health-preserving tea is prepared from the following raw materials in parts by weight: 15-25 parts of rhizoma polygonati, 10-20 parts of Chinese wolfberry fruits, 8-15 parts of mulberries, 6-12 parts of Chinese yams, 5-10 parts of red dates, 2-5 parts of licorice roots, 3-8 parts of maltodextrin and 2-6 parts of xylitol. In the preparation method, the raw materials are subjected to differential pretreatment, the rhizoma polygonati is subjected to steam fixation and vacuum drying, the Chinese yam is subjected to freeze drying, other auxiliary raw materials are subjected to hot air drying, and the finished product is prepared through advanced processes such as ultrasonic extraction and spray granulation. The invention solves the problems of insufficient release of active ingredients, poor taste, poor stability, backward process and the like of the existing polygonatum sibiricum and Chinese wolfberry health-preserving tea, realizes double improvement of health-preserving efficacy and drinking experience, and has the advantages of high active ingredient content, good stability, wide applicable crowd and good market application prospect.

Description

Technical Field

[0001] This invention relates to the field of food and medicine homology beverage technology, and in particular to a food and medicine homology health tea and its preparation method. Background Technology

[0002] With the increasing health awareness of people, health-preserving drinks that combine nutritional supplementation and health conditioning are gradually becoming a mainstream choice in daily consumption. Polygonatum, a traditional food and medicine ingredient, is sweet and neutral in nature, and enters the lung, spleen, and kidney meridians. It has the effects of replenishing qi and yin, strengthening the spleen and lungs, and nourishing the kidneys and replenishing essence. Goji berries are sweet and neutral in nature, and enter the liver and kidney meridians. They have the effects of nourishing the liver and kidneys, replenishing essence, and improving eyesight. Using the two together can achieve synergistic effects and enhance the health benefits.

[0003] In existing technologies, health teas made with Polygonatum and Lycium barbarum are quite common, but they generally suffer from the following drawbacks: First, the raw material processing methods are simple, often involving direct crushing or simple drying, making it difficult to fully release the active ingredients such as polysaccharides in Polygonatum and Lycium barbarum, resulting in low absorption rates by the human body; second, the preparation process is outdated, often involving direct packaging after mixing, which easily leads to problems such as clumping of ingredients, uneven flavor, and short shelf life; third, the formula is unreasonable, often simply mixing Polygonatum and Lycium barbarum without combining them with other food-medicine homologous ingredients to achieve complementary effects, and failing to address the sticky taste of Polygonatum itself, resulting in a poor drinking experience; fourth, there is a lack of systematic experimental verification, with no clear test data on the content of active ingredients, health benefits, and stability, making it impossible to guarantee the consistency and reliability of product quality.

[0004] Therefore, developing a medicinal and edible health tea with scientific raw material processing, advanced preparation technology, reasonable formula, high utilization rate of active ingredients, clear health benefits, and in line with production realities, as well as its preparation method, has become an urgent technical problem to be solved. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a medicinal and edible health tea and its preparation method. Using Polygonatum and Lycium barbarum as core ingredients, combined with other medicinal and edible ingredients, the invention optimizes the raw material processing and preparation process to solve problems such as insufficient release of active ingredients, poor taste, and poor stability in existing products. This achieves a dual improvement in health benefits and drinking experience, and the process is simple and controllable, meeting the requirements for large-scale production.

[0006] To achieve the above objectives, the present invention provides a medicinal and edible health-preserving tea, which is prepared from the following raw materials in parts by weight: 15-25 parts of Polygonatum sibiricum, 10-20 parts of Lycium barbarum, 8-15 parts of Morus alba, 6-12 parts of Dioscorea opposita, 5-10 parts of Jujube, 2-5 parts of Glycyrrhiza uralensis, 3-8 parts of maltodextrin, and 2-6 parts of xylitol.

[0007] Preferably, it is prepared from the following raw materials in parts by weight: 20 parts Polygonatum sibiricum, 15 parts Lycium barbarum, 12 parts Mulberry, 9 parts Dioscorea opposita, 7 parts Jujube, 3 parts Glycyrrhiza uralensis, 5 parts Maltodextrin, and 4 parts Xylitol.

[0008] The functions of each raw material are as follows: Polygonatum: The core health-promoting ingredient, providing active substances such as Polygonatum polysaccharides, which can replenish qi, nourish yin, strengthen the spleen, moisten the lungs, benefit the kidneys, and replenish essence.

[0009] Goji berries: The core health-promoting ingredient provides active substances such as goji polysaccharides, which work synergistically with polygonatum to enhance the effects of nourishing the liver and kidneys, replenishing essence, and improving eyesight.

[0010] Mulberry: A health-promoting ingredient, sweet and sour in taste and cold in nature, it enters the heart, liver and kidney meridians. It can nourish yin and blood, generate fluids and moisten dryness. When combined with polygonatum and wolfberry, it can enhance the effects of nourishing yin and blood.

[0011] Yam: A health-promoting ingredient, sweet in taste and neutral in nature, it enters the spleen, lung and kidney meridians. It can invigorate qi, nourish yin, strengthen the spleen, lung and kidney, consolidate essence and stop leukorrhea, alleviate the sticky taste of Polygonatum, and enhance the spleen-strengthening effect.

[0012] Red dates: A health-promoting ingredient, sweet and warm in nature, entering the spleen, stomach and heart meridians. They can replenish qi and blood, calm the mind, harmonize the taste of various ingredients, and enhance the smoothness of the beverage.

[0013] Licorice: A harmonizing ingredient, sweet in taste and neutral in nature, it enters the heart, lung, spleen and stomach meridians. It can invigorate qi, replenish the middle jiao, clear heat and detoxify, harmonize various medicines, alleviate the cold nature of raw materials, and harmonize the overall flavor.

[0014] Maltodextrin: a filler and stabilizer that improves product flowability, prevents clumping, extends shelf life, and improves product reconstitution properties.

[0015] Xylitol: A sweetener that replaces traditional sucrose, has a refreshing and sweet taste, is suitable for all types of people, and does not affect blood sugar levels.

[0016] On the other hand, the present invention also provides a method for preparing a medicinal and edible health-preserving tea, comprising the following steps: S1. Raw material screening and cleaning: Select Polygonatum, wolfberry, mulberry, yam, red date and licorice that are free from mold, insects and impurities. Rinse them 2-3 times with deionized water to remove surface dust and impurities, and then drain the water for later use. Among them, peel and wash the yam, and remove the pits from the red dates and wash them. S2. Raw material pretreatment: S21. Pretreatment of Polygonatum: After cleaning, Polygonatum is cut into thin slices with a thickness of 2-3 mm, placed in a steam blanching machine, and blanched at 105-110℃ for 3-5 minutes. Then, it is transferred to a vacuum drying oven and dried at 60-65℃ and a vacuum degree of -0.07 to -0.05 MPa until the moisture content is ≤8%. Then, it is pulverized in an ultra-fine pulverizer and passed through a 100-120 mesh sieve to obtain Polygonatum ultra-fine powder. S22. Pretreatment of wolfberry and other raw materials: After washing, wolfberry, mulberry, red dates and licorice are placed in a hot air drying oven and dried at 55-60℃ until the moisture content is ≤8%; yam is placed in a freeze dryer and freeze-dried at -40 to -35℃ and vacuum degree -0.09 to -0.08MPa until the moisture content is ≤8%; the dried raw materials are then placed in an ultra-fine pulverizer and pulverized, and passed through a 100-120 mesh sieve to obtain ultra-fine powder of each raw material; S3. Extraction and Concentration: Mix the ultrafine powders of Polygonatum sibiricum, Lycium barbarum, Mulberry, Dioscorea opposita, Jujube, and Glycyrrhiza uralensis evenly. Add 8-12 times the total weight of deionized water to adjust the pH to 6.5-7.5. Place the mixture in an ultrasonic extraction device and extract 2-3 times at a power of 200-300W and a temperature of 50-60℃, for 30-40 minutes each time. Combine the extracts. Transfer the combined extracts to a vacuum concentrator and concentrate them at 50-55℃ and a vacuum of -0.08 to -0.06MPa to a concentration with a relative density of 1.10-1.15. S4. Mixing and granulation: Mix the concentrated liquid with maltodextrin and xylitol evenly, put it into a spray granulator, adjust the inlet air temperature to 160-170℃, the outlet air temperature to 70-80℃, and the feed rate to 20-30mL / min, and spray granulate to obtain particles with a particle size of 80-100 mesh. S5. Drying and sieving: Place the granulated particles into a vacuum drying oven and dry them at 55-60℃ and a vacuum degree of -0.07 to -0.05MPa until the moisture content is ≤5%. Then, sieve them with an 80-100 mesh sieve to remove impurities and unqualified particles. S6. Sterilization and Packaging: Place the sieved granules into a microwave sterilization device and sterilize for 2-3 minutes at a power of 300-400W and a temperature of 70-80℃. Then, package them in a sterile environment, each bag containing 5-10g, and seal them to obtain the finished product of the medicinal and edible health tea.

[0017] Therefore, the medicinal and edible health-preserving tea of ​​the present invention and its preparation method have the following beneficial effects: (1) This invention uses Polygonatum and wolfberry as core ingredients, and scientifically combines them with food and medicine ingredients such as mulberry, yam, red date, and licorice to achieve synergistic effects and solve the problems of single formula and limited efficacy of existing products. At the same time, the addition of maltodextrin and xylitol not only improves the product’s solubility and taste, but also avoids the drawbacks of traditional sucrose, making it suitable for all kinds of people to drink. The addition of yam also alleviates the sticky taste of Polygonatum and enhances the drinking experience.

[0018] (2) The present invention adopts a differentiated pretreatment method for raw materials. Polygonatum is steam-killed and vacuum-dried, Lycium barbarum and other raw materials are dried by hot air, and Dioscorea opposita is freeze-dried. This method retains the active ingredients in each raw material to the maximum extent and solves the problems of insufficient release and low utilization of active ingredients in the existing technology. Ultrasonic extraction technology is adopted, which has higher extraction efficiency and more complete extraction of active ingredients compared with traditional water boiling extraction. The extraction temperature is also lower, which avoids damage to active ingredients. Spray granulation process is adopted, which produces uniform particles, good flowability, and less clumping compared with traditional mixing process. It also has better reconstitution properties and meets the requirements of large-scale production. The entire process is scientific and reasonable, with strong controllability, which solves the problems of outdated preparation process and unstable product quality in the existing process.

[0019] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is the result of the active ingredient content test. Detailed Implementation

[0022] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] To make the objectives, technical solutions, and advantages of this application clearer, more thorough, and more complete, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings and embodiments. The following detailed descriptions are all illustrations of embodiments, intended to provide further detailed explanation of the present invention. Unless otherwise specified, all technical terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0024] The instruments, equipment, reagents, and materials used in the examples were all obtained commercially.

[0025] Example 1 A medicinal and edible health-preserving tea is prepared from the following ingredients in parts by weight: 15 parts Polygonatum sibiricum, 10 parts Lycium barbarum, 8 parts Mulberry, 6 parts Dioscorea opposita, 5 parts Jujube, 2 parts Glycyrrhiza uralensis, 3 parts Maltodextrin, and 2 parts Xylitol.

[0026] Preparation method: S1. Raw material screening and cleaning: Select Polygonatum, wolfberry, mulberry, yam, red date and licorice that are free from mold, insects and impurities. Rinse them twice with deionized water to remove surface dust and impurities, and drain the water. Peel and clean the yam, and remove the pits and clean the red date.

[0027] S2. Raw material pretreatment: Polygonatum is cut into 2mm thin slices, steamed at 105℃ for 3 minutes, vacuum dried at 60℃ and vacuum degree -0.07MPa until the moisture content is ≤8%, and then ultra-finely pulverized through a 100-mesh sieve; Lycium barbarum, mulberry, red dates, and licorice are dried with hot air at 55℃ until the moisture content is ≤8%, and Dioscorea opposita is freeze-dried at -40℃ and vacuum degree -0.09MPa until the moisture content is ≤8%, and then ultra-finely pulverized through a 100-mesh sieve.

[0028] S3. Extraction and Concentration: Mix the ultrafine powders of each raw material, add 8 times the amount of deionized water, adjust the pH value to 6.5, and extract twice with ultrasonic waves at 200W and 50℃ for 30 minutes each time. Combine the extracts and concentrate at 50℃ and vacuum degree -0.08MPa to a concentrate with a relative density of 1.10.

[0029] S4. Mixing and granulation: Mix the concentrate with maltodextrin and xylitol evenly, spray granulation, with inlet air temperature of 160℃, outlet air temperature of 70℃, and feed rate of 20mL / min to obtain 80 mesh particles.

[0030] S5. Drying and sieving: Vacuum drying at 55℃ and vacuum degree -0.07MPa until moisture content ≤5%, then sieve through an 80-mesh sieve.

[0031] S6. Sterilization and Packaging: Microwave sterilization at 300W and 70℃ for 2 minutes, aseptically dispensed into 5g bags, and sealed.

[0032] Example 2 A medicinal and edible health-preserving tea is prepared from the following ingredients in parts by weight: 20 parts Polygonatum sibiricum, 15 parts Lycium barbarum, 12 parts Mulberry, 9 parts Dioscorea opposita, 7 parts Jujube, 3 parts Glycyrrhiza uralensis, 5 parts Maltodextrin, and 4 parts Xylitol.

[0033] Preparation method: S1. Raw material screening and cleaning: Select Polygonatum, wolfberry, mulberry, yam, red date and licorice that are free from mold, insects and impurities. Rinse them three times with deionized water to remove surface dust and impurities and drain the water. Peel and clean the yam and remove the pits from the red dates.

[0034] S2. Raw material pretreatment: Polygonatum is cut into 2.5mm thin slices, steamed at 108℃ for 4min, vacuum dried at 62℃ and -0.06MPa until the moisture content is ≤8%, and then ultra-finely pulverized through a 110-mesh sieve; Lycium barbarum, mulberry, red dates, and licorice are dried with hot air at 58℃ until the moisture content is ≤8%, and Dioscorea opposita is freeze-dried at -38℃ and -0.085MPa until the moisture content is ≤8%, and then ultra-finely pulverized through a 110-mesh sieve.

[0035] S3. Extraction and Concentration: Mix the ultrafine powders of each raw material, add 10 times the amount of deionized water, adjust the pH value to 7.0, and extract twice with ultrasound at 250W and 55℃ for 35 minutes each time. Combine the extracts and concentrate at 52℃ and vacuum degree -0.07MPa to a concentrate with a relative density of 1.12.

[0036] S4. Mixing and granulation: The concentrate is mixed evenly with maltodextrin and xylitol, and then spray granulated with an inlet air temperature of 165°C, an outlet air temperature of 75°C, and a feed rate of 25 mL / min to obtain 90-mesh granules.

[0037] S5. Drying and sieving: Vacuum drying at 58℃ and vacuum degree -0.06MPa until moisture content ≤5%, then sieve through a 90-mesh sieve.

[0038] S6. Sterilization and Packaging: Microwave sterilization at 350W and 75℃ for 2.5 minutes, aseptically packaged into 8g bags, and sealed.

[0039] Example 3 A medicinal and edible health-preserving tea is prepared from the following ingredients in parts by weight: 25 parts Polygonatum sibiricum, 20 parts Lycium barbarum, 15 parts Mulberry, 12 parts Dioscorea opposita, 10 parts Jujube, 5 parts Glycyrrhiza uralensis, 8 parts Maltodextrin, and 6 parts Xylitol.

[0040] Preparation method: S1. Raw material screening and cleaning: Select Polygonatum, wolfberry, mulberry, yam, red date and licorice that are free from mold, insects and impurities. Rinse them three times with deionized water to remove surface dust and impurities and drain the water. Peel and clean the yam and remove the pits from the red dates.

[0041] S2. Raw material pretreatment: Polygonatum is cut into 3mm thin slices, steamed at 110℃ for 5 minutes, vacuum dried at 65℃ and vacuum degree -0.05MPa until the moisture content is ≤8%, and then ultra-finely pulverized through a 120-mesh sieve; Lycium barbarum, mulberry, red dates, and licorice are dried with hot air at 60℃ until the moisture content is ≤8%, and Dioscorea opposita is freeze-dried at -35℃ and vacuum degree -0.08MPa until the moisture content is ≤8%, and then ultra-finely pulverized through a 120-mesh sieve.

[0042] S3. Extraction and Concentration: Mix the ultrafine powders of each raw material, add 12 times the amount of deionized water, adjust the pH value to 7.5, and extract three times with ultrasonic waves at 300W and 60℃, each time for 40 minutes. Combine the extracts and concentrate at 55℃ and vacuum degree -0.06MPa to a concentrate with a relative density of 1.15.

[0043] S4. Mixing and granulation: Mix the concentrate with maltodextrin and xylitol evenly, spray granulation, with inlet air temperature of 170℃, outlet air temperature of 80℃, and feed rate of 30mL / min to obtain 100 mesh particles.

[0044] S5. Drying and sieving: Vacuum drying at 60℃ and vacuum degree -0.05MPa until moisture content ≤5%, then sieve through a 100-mesh sieve.

[0045] S6. Sterilization and Packaging: Microwave sterilization at 400W and 80℃ for 3 minutes, aseptically packaged into 10g bags, and sealed.

[0046] Comparative Example 1 A health-preserving tea is prepared from the following ingredients in parts by weight: 20 parts Polygonatum sibiricum, 15 parts Lycium barbarum, 5 parts maltodextrin, and 4 parts xylitol (no other auxiliary ingredients).

[0047] Preparation method: Using traditional mixing process, Polygonatum and Lycium barbarum are directly pulverized and passed through a 100-mesh sieve, mixed evenly with maltodextrin and xylitol, microwave sterilized and directly packaged, without extraction, granulation and other steps.

[0048] Comparative Example 2 A health-preserving tea, with the same raw material formula as in Example 2.

[0049] Preparation method: The raw materials are not pretreated, directly crushed and mixed, and extracted by boiling in water (boiling in water at 100℃ for 60 minutes, once). After concentration, they are directly dried and crushed without spray granulation. The remaining steps are the same as in Example 2.

[0050] Comparative Example 3 A health-preserving tea, with the same raw material formula as in Example 2.

[0051] Preparation method: Ultrasonic extraction was not used; instead, traditional boiling extraction was performed (boiling at 100°C for 60 minutes, twice). The remaining steps were the same as in Example 2.

[0052] Test Example 1 Active ingredient content test: Test indicators: Polygonatum polysaccharide content (determined by phenol-sulfuric acid colorimetric method), Lycium barbarum polysaccharide content (determined by phenol-sulfuric acid colorimetric method).

[0053] Test method: Take 1g of each sample, add 50mL of deionized water, extract ultrasonically for 30min, filter, and determine the content of active ingredients in the filtrate according to the corresponding method. Each sample is measured in triplicate, and the average value is taken. Test results are as follows: Figure 1 As shown.

[0054] It can be seen that the contents of Polygonatum polysaccharides and Lycium barbarum polysaccharides in Examples 1-3 are significantly higher than those in Comparative Examples 1-3. Comparative Example 1, lacking auxiliary raw materials and without extraction or granulation processes, had the lowest content due to difficulty in releasing active ingredients. Comparative Example 2, without pretreatment of raw materials and without spray granulation, had insufficient retention of active ingredients. Comparative Example 3, without ultrasonic extraction, had low extraction efficiency and insufficient extraction of active ingredients. This demonstrates that the formulation and preparation process of the present invention can effectively increase the content of active ingredients and enhance the health benefits of the product.

[0055] Test Example 2 Sensory evaluation test: Evaluation panel: Composed of 10 professional evaluators, who evaluate from four dimensions: color, aroma, taste, and reconstitution. Each dimension is worth 25 points, for a total of 100 points.

[0056] Evaluation criteria: Color (25 points): The color is uniform, ranging from light yellow to yellowish-brown, without any impurities; Odor (25 points): It has the natural fragrance of Polygonatum and wolfberry, without any off-odor or burnt smell; Taste (25 points): The taste is sweet, smooth and mellow, without stickiness or bitterness; Instability (25 points): Dissolves quickly in warm water without sediment or clumping; The test results are shown in Table 1.

[0057] Table 1 Sensory evaluation results

[0058] Results Analysis: The sensory evaluation scores of Examples 1-3 were all above 90 points, with Example 2 achieving the highest score of 96 points, indicating that the product of this invention has uniform color, a pleasant aroma, good taste, and excellent dissolving properties. Comparative Example 1, due to its outdated process, had uneven color, a weak aroma, a sticky taste, and poor dissolving properties, resulting in the lowest total score. Comparative Example 2, lacking spray granulation, had poor dissolving properties and a slightly sticky taste. Comparative Example 3, due to an insufficiently optimized extraction process, had slightly inferior aroma and taste. This demonstrates that the formulation and preparation process of this invention can effectively improve the sensory quality of the product and enhance the drinking experience.

[0059] Test Example 3 Stability test: Test conditions: Each sample was stored in a constant temperature and humidity chamber at 38℃ and 75% relative humidity for 6 months. Samples were taken at 0 months, 2 months, 4 months and 6 months of storage to test the moisture content, clumping and retention rate of active ingredients. Test indicators: moisture content, clumping status (no clumping = 5 points, slight clumping = 3 points, severe clumping = 1 point), Polygonatum polysaccharide retention rate, Lycium barbarum polysaccharide retention rate; The test results are shown in Table 2.

[0060] Table 2 Stability Test Results

[0061] Results Analysis: Example 2, exhibiting the best overall performance, was compared with Comparative Examples 1 and 2 for stability. After 6 months of storage, Example 2 maintained a moisture content below 4.7%, exhibited no clumping, and retained over 94% of both Polygonatum sibiricum and Lycium barbarum polysaccharides, demonstrating excellent stability. Comparative Example 1, lacking optimization treatment, experienced a rapid increase in moisture content, resulting in severe clumping after 4 months of storage and a significant decrease in the retention rate of active ingredients. Comparative Example 2, without spray granulation, showed slight clumping after 2 months of storage, and its active ingredient retention rate was also significantly lower than that of Example 2. This indicates that the preparation process of the present invention can effectively improve product stability and extend shelf life.

[0062] Test Example 4 Health benefits test: Test subjects: Sixty volunteers with weak constitution, easy fatigue and blurred vision were randomly divided into 6 groups of 10 people each. They drank one sachet of the product from Examples 1-3 and Comparative Examples 1-3 respectively, and drank it daily with 200mL of warm water for 30 consecutive days.

[0063] Test indicators: fatigue relief effect (effective = significant reduction in fatigue, ineffective = no change in fatigue), vision improvement effect (effective = reduction in blurred vision, ineffective = no change in blurred vision), physical fitness improvement effect (effective = improved physical fitness, less prone to fatigue, ineffective = no change in physical fitness); test results are shown in Table 3.

[0064] Table 3 Evaluation of Health Benefits

[0065] Results Analysis: The products of Examples 1-3 showed significantly higher efficacy rates in fatigue relief, vision improvement, and physical condition improvement compared to Comparative Examples 1-3. Example 2 exhibited the highest efficacy rate, achieving 100% for both fatigue relief and physical condition improvement, and 90% for vision improvement. Comparative Example 1, due to its low content of active ingredients and simple formula, had the worst health benefits. Comparative Examples 2 and 3, due to their outdated processing methods and low utilization rate of active ingredients, also showed significantly insufficient health benefits. This indicates that the health-preserving tea of ​​the present invention can effectively leverage the synergistic health benefits of Polygonatum and Lycium barbarum, improving physical condition, relieving fatigue, and protecting vision.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A medicinal and edible health-preserving tea, characterized in that, It is prepared from the following raw materials in parts by weight: 15-25 parts Polygonatum sibiricum, 10-20 parts Lycium barbarum, 8-15 parts Mulberry, 6-12 parts Dioscorea opposita, 5-10 parts Jujube, 2-5 parts Glycyrrhiza uralensis, 3-8 parts Maltodextrin, and 2-6 parts Xylitol.

2. The medicinal and edible health-preserving tea according to claim 1, characterized in that, It is prepared from the following raw materials in parts by weight: 20 parts Polygonatum sibiricum, 15 parts Lycium barbarum, 12 parts Mulberry, 9 parts Dioscorea opposita, 7 parts Jujube, 3 parts Glycyrrhiza uralensis, 5 parts Maltodextrin, and 4 parts Xylitol.

3. A method for preparing a medicinal and edible health-preserving tea as described in claim 1 or 2, characterized in that, Includes the following steps: S1. Raw material screening and cleaning: Select Polygonatum, wolfberry, mulberry, yam, red date and licorice that are free from mold, insects and impurities. Rinse them 2-3 times with deionized water to remove surface dust and impurities, and drain them for later use. Among them, peel and wash the yam, and remove the pits from the red dates and wash them. S2. Raw material pretreatment: S21. Polygonatum pretreatment: After cleaning, Polygonatum is cut into thin slices with a thickness of 2-3 mm, blanched at 105-110℃ for 3-5 min, dried at 60-65℃ and vacuum degree -0.07 to -0.05 MPa until the moisture content is ≤8%, pulverized, and passed through a 100-120 mesh sieve to obtain Polygonatum ultrafine powder; S22. Pretreatment of wolfberry and other raw materials: The washed wolfberry, mulberry, red dates and licorice are dried at 55-60℃ until the moisture content is ≤8%; the yam is freeze-dried at -40 to -35℃ and vacuum degree -0.09 to -0.08MPa until the moisture content is ≤8%. The dried raw materials were pulverized separately and passed through a 100-120 mesh sieve to obtain ultrafine powders of each raw material. S3. Extraction and Concentration: Mix the ultrafine powders of Polygonatum sibiricum, Lycium barbarum, Mulberry, Dioscorea opposita, Jujube, and Glycyrrhiza uralensis evenly. Add 8-12 times the total weight of deionized water to adjust the pH to 6.5-7.

5. Extract the mixture using ultrasound at 200-300W and 50-60℃ for 2-3 times, each extraction lasting 30-40 minutes. Combine the extracts. Concentrate the combined extracts at 50-55℃ and a vacuum of -0.08 to -0.06MPa to a concentration with a relative density of 1.10-1.

15. S4. Mixing and granulation: Mix the concentrate with maltodextrin and xylitol evenly, and then spray granulate to obtain particles with a particle size of 80-100 mesh. Place the mixture into a spray granulator, adjust the inlet air temperature to 160-170℃, the outlet air temperature to 70-80℃, and the feed rate to 20-30mL / min. S5. Drying and sieving: Place the granulated particles in a vacuum of 55-60℃ and -0.07 to -0.05MPa and dry until the moisture content is ≤5%. Then, sieve them with an 80-100 mesh sieve to remove impurities and unqualified particles. S6. Sterilization and Packaging: Sterilize the sieved granules at 300-400W and 70-80℃ for 2-3 minutes, and then repackage them in a sterile environment.

4. The preparation method according to claim 3, characterized in that: In S2, the thickness of the Polygonatum slices is 2.5 mm, the steam blanching temperature is 108℃, and the blanching time is 4 min; the vacuum drying temperature is 62℃, and the vacuum degree is -0.06 MPa.

5. The preparation method according to claim 3, characterized in that, In S2, the hot air drying temperature for wolfberry, mulberry, red date, and licorice is 58℃; the freeze drying temperature for yam is -38℃, and the vacuum degree is -0.085MPa.

6. The preparation method according to claim 3, characterized in that, In S3, the amount of deionized water added is 10 times the total weight of the raw materials, and the pH value is adjusted to 7.0; the ultrasonic extraction power is 250W, the extraction temperature is 55℃, the extraction is performed twice, and the extraction time is 35min each time.

7. The preparation method according to claim 3, characterized in that, In S3, the vacuum concentration temperature is 52℃, the vacuum degree is -0.07MPa, and the relative density of the concentrate is 1.

12.

8. The preparation method according to claim 3, characterized in that, In S4, the inlet air temperature for spray granulation is 165℃, the outlet air temperature is 75℃, the feed rate is 25mL / min, and the particle size is 90 mesh.

9. The preparation method according to claim 3, characterized in that, In S5, the vacuum drying temperature is 58℃ and the vacuum degree is -0.06MPa; the sieve used for sieving is 90 mesh.

10. The preparation method according to claim 3, characterized in that, In S6, the microwave sterilization power is 350W, the sterilization temperature is 75℃, and the sterilization time is 2.5min.

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