CN110973303A

CN110973303A - Instant weight-reducing tea

Info

Publication number: CN110973303A
Application number: CN201911285944.7A
Authority: CN
Inventors: 张博学; 张倩倩; 易瑶
Original assignee: Liping Boyuan Ecological Agricultural Science & Technology Co ltd
Current assignee: Liping Boyuan Ecological Agricultural Science & Technology Co ltd
Priority date: 2019-12-13
Filing date: 2019-12-13
Publication date: 2020-04-10

Abstract

The invention belongs to the field of health-care tea, and particularly relates to instant weight-reducing tea; from the aspect of yin-yang balance in traditional Chinese medicine, the traditional Chinese medicines such as rhizoma polygonati, polygonatum odoratum, lotus leaves and semen cassiae are combined to play roles in clearing away heat and toxic materials, clearing summer heat and eliminating dampness, promoting diuresis and relaxing bowels and accelerating metabolism, so that the effects of reducing fat and expelling toxin, regulating spleen and stomach and clearing liver can be achieved, the body organs are not damaged while the weight is reduced, the fat is reduced mainly by visceral fat, the morbidity of diseases such as fatty liver is reduced, and the immunity of the organism is improved.

Description

Instant weight-reducing tea

Technical Field

The invention belongs to the field of health-care tea, and particularly relates to instant weight-reducing tea.

Background

Obesity is a common metabolic disorder, and when a person eats more than the consumed calorie, the calorie is stored in the body in the form of fat, and the amount of the fat exceeds the normal physiological requirement and reaches a certain value, the obesity is known. Currently, Body Mass Index (BMI) is used clinically to evaluate whether obesity is present, and obesity is defined as when the BMI value is 24-26.9, obesity is defined as 27-29.9, and obesity is severe when 30 or more. Obesity is susceptible to a variety of conditions, such as: hypertension, coronary heart disease and various cardiovascular and cerebrovascular diseases can also cause diabetes, hyperlipidemia, fatty liver and other diseases. Most people suffering from obesity are caused by too greasy diet, low exercise capacity, and considerable burden and even damage to body organs due to accumulation of fat. Some people can achieve the purpose of quickly losing weight by taking weight-reducing medicines, fasting, fat-pumping and the like, but the methods cannot completely solve the problem of obesity, even bring side effects and irreversible damage to the body, only consider the body fat rate, and do not pay attention to the health of body organ functions.

At present, various health-care tea is basically in the form of tea bags, solid tea and tea drinks, and has the defects of difficult carrying or incomplete absorption because beneficial components cannot be completely dissolved out due to short brewing time. The instant tea is easy to carry, controllable in dosage, quick to absorb and easy to store, so that the drug effect is retained to the maximum extent.

Patent document with publication number CN109925451A discloses a fat-reducing and weight-losing tea drink, which comprises the following components in parts by weight: 2-3 parts of dogbane leaf, 2-3 parts of tartary buckwheat, 1-2 parts of cassia seed, 1-2 parts of astragalus root, 1-2 parts of cooked pearl barley, 1-2 parts of bupleurum, 1-2 parts of salvia miltiorrhiza, 1-2 parts of rhizoma polygonati, 1-2.5 parts of hawthorn, 0.5-1 part of fructus aurantii and 0.5-1 part of liquorice; the folium apocyni veneti and the tartary buckwheat are used as monarch drugs and are mainly used for reducing blood fat, preventing the rise of blood fat and blood pressure and reducing the risk of cardiovascular diseases, and the compatible hawthorn has the functions of helping digestion and invigorating stomach, so that an obese person can feel hungry after drinking to increase the food intake, and the traditional Chinese medicine has adverse effects. The rhizoma polygonati is used in the formula, but the medicinal materials which are not balanced with the rhizoma polygonati can achieve the effect of losing weight after being drunk, but have no repairing effect on injured organ cells.

Therefore, a weight loss method which can effectively reduce the weight without rebounding and has no side effect on the functions of organs of the body is needed to be found.

Disclosure of Invention

The invention provides instant weight-reducing tea for solving the problems.

The method is realized by the following technical scheme:

1. mixing and crushing 9-21 parts of rhizoma polygonati and 12-28 parts of radix polygonati officinalis in parts by weight, extracting by a subcritical fluid extraction method at the temperature of 5-10mpa and the temperature of 17-25 ℃ and under the condition that the material-liquid ratio is 1:15-2 to obtain an extraction liquid, and sterilizing the extraction liquid by ultraviolet rays with the wavelength of 250-260nm for 30-50s to obtain an auxiliary liquid, wherein the extracting agent can be water;

2. after the tea leaves are placed at the temperature of 0-12 ℃ for half a year, 50-70 parts by weight of the tea leaves are taken, and the auxiliary liquid is uniformly sprayed on the tea leaves under the conditions of constant temperature and constant humidity until the auxiliary liquid is absorbed to slightly moisten the tea leaves;

the constant temperature and humidity are under the conditions that the temperature is 18-22 ℃ and the humidity is 65-75%; under the condition, the pores of the tea leaves are opened, so that the auxiliary liquid is better adsorbed by the tea leaves.

3. Physically crushing 7-14 parts by weight of lotus leaves, 3-8 parts by weight of semen cassiae and 5-17 parts by weight of sophora flowers to obtain plant liquid and plant residues, adding water with the same weight into the plant residues, decocting for 1 hour, filtering, taking filtrate, mixing the plant liquid and the filtrate to obtain mixed liquid, adding 5-12% by weight of plant protease and pectinase in a proportion of 1.5:1 into the mixed liquid for enzymolysis for 45-70min, performing microwave radiation for 5-10s for enzyme inactivation with the frequency of 1000-1200W, eluting by using a silica gel column, and concentrating to half of the volume to obtain a plant extract;

4. superfine crushing tea leaves, dissolving the tea leaves in a plant extract, drying the tea leaves in vacuum to obtain primary tea powder, dissolving 10 to 14 parts by weight of alginic acid in 1.5 to 2 times of organic acid by weight, adding the primary tea powder, heating the mixture to 50 to 55 ℃, dripping 1 to 3 percent of cross-linking agent into the mixture, continuously reacting the mixture for 1 to 1.5 hours, concentrating, drying and crushing the mixture to obtain the instant weight-reducing tea;

the organic acid comprises but is not limited to citric acid and acetic acid, and the concentration is not more than 10%;

the cross-linking agent includes, but is not limited to, calcium lactate, calcium chloride, and calcium phosphate.

In conclusion, the beneficial effects of the invention are as follows: the traditional Chinese medicine composition disclosed by the invention starts from the aspect of yin-yang balance of the traditional Chinese medicine, and has the effects of clearing away heat and toxic materials, clearing summer heat and eliminating dampness, inducing diuresis and relaxing bowels and accelerating metabolism by matching traditional Chinese medicines such as rhizoma polygonati, polygonatum odoratum, lotus leaves and semen cassiae, and has the effects of tonifying qi and yin, invigorating spleen and promoting fluid production, moistening lung and tonifying kidney, so that the fat is reduced and the toxin is eliminated, the effects of regulating spleen and stomach and cleaning liver are realized, the body organs are not damaged while the weight is reduced, the fat is reduced by taking visceral fat as a main component, the morbidity of diseases such as fatty liver is reduced, and the immunity.

The traditional Chinese medicine composition is prepared by following the monarch, minister, assistant and guide of traditional Chinese medicines, and the polygonatum is used as a monarch medicine and is compatible with medicinal materials such as rhizoma polygonati, semen cassiae, flos sophorae and the like, wherein the pharmacological actions of the components are as follows: rhizoma polygonati is sweet in taste and neutral in nature, enters spleen channels, lung channels and kidney channels, has the effects of tonifying qi and yin, strengthening spleen, moistening lung and tonifying kidney, is commonly used for spleen and stomach qi deficiency, tiredness and hypodynamia, stomach yin deficiency, dry mouth and poor appetite, lung deficiency and dry cough, fatigue cough and hemoptysis, essence and blood deficiency, soreness and weakness of waist and knees, premature graying of hair, internal heat and thirst quenching, and simultaneously, rhizoma polygonati polysaccharide and saponin contained in the rhizoma polygonati polysaccharide and saponin have a repairing effect on damaged cells to a certain degree. Yu Zhu has the actions of nourishing yin, moistening dryness, promoting the production of body fluid and quenching thirst, and is commonly used for yin injury of lung and stomach, cough due to dryness-heat, dry throat and thirst, and diabetes due to internal heat. The polygonatum odoratum is used for reducing fat and expelling toxin to achieve the effect of nourishing yin, and the polygonatum odoratum and the polygonatum sibiricum are matched to warm yang in the process of nourishing yin so as to achieve the balance of yin and yang, in the process of losing weight, only the polygonatum odoratum or the polygonatum sibiricum can achieve the effect of losing weight, but yin and yang cannot be balanced, the whole prescription is cold in partial yin and dry in partial yang in the case of only the polygonatum odoratum, and meanwhile, the polygonatum odoratum can stimulate splenic lymphocyte proliferation so as to achieve the effect of improving the cellular immune function. Cassia seed, bitter, sweet, salty and slightly cold in nature, enters liver, kidney and large intestine meridians; loosening bowel to relieve constipation, reducing blood lipid, improving eyesight, and treating constipation, hyperlipemia, and hypertension. Clearing liver-fire, improving eyesight, promoting diuresis, relaxing bowels, lowering blood pressure, and reducing blood lipid. The lotus leaves are bitter in taste and neutral in nature, enter liver, spleen and stomach channels, have the effects of clearing summer heat, resolving dampness, raising fever, clearing yang, cooling blood and stopping bleeding, and are used for summer heat, polydipsia, summer heat, damp diarrhea, spleen deficiency diarrhea, blood heat, hematemesis and epistaxis, hematochezia and metrorrhagia and metrostaxis. Flos Sophorae Immaturus enters liver and large intestine channels, has effects of cooling blood, stopping bleeding, clearing liver-fire, and containing rutin and quercetin, and has effects of effectively reducing blood sugar, lowering blood pressure, protecting intestine and stomach, and improving immunity, and has inhibitory effect on Escherichia coli, Bacillus subtilis, and Staphylococcus aureus. Firstly, the tea leaves are placed for more than half a year, so that the content of tea polyphenol in the tea leaves is reduced, the influence of the tea polyphenol on the drug effects of the sealwort and the polygonatum is avoided, and meanwhile, the stimulation of the tea leaves on the stomach and intestine is correspondingly reduced due to the reduction of the tea polyphenol. The auxiliary liquid is prepared by extracting and sterilizing the sealwort and the polygonatum, so that the efficacy of the sealwort and the polygonatum is higher than that of the traditional water decoction mode, the auxiliary liquid is sprayed on the tea, the effective components in the sealwort and the polygonatum are absorbed and fixed by utilizing the respiration of the tea, the sealwort and the polygonatum are extracted by subcritical fluid at low temperature, the auxiliary liquid is more time-saving, efficient and industrialized than a supercritical extraction method, the effective components are not damaged by low-temperature extraction, water can be used as an extracting agent, and the use and the residue of an organic solvent are reduced. The plant extract is subjected to enzymolysis treatment during preparation to effectively remove protein and pectin, meanwhile, the active ingredients are not damaged, so that the purity of the plant extract is higher, the drug effect can be better exerted, enzyme deactivation treatment is carried out through microwave radiation, further improves the purity of the plant extract, simultaneously has the sterilization effect on the extract, utilizes alginic acid and extracting solution to coat the tea powder absorbing the effective components of polygonatum and polygonatum, the alginic acid and organic acid are polymerized into a high molecular structure with strong ductility under the action of a cross-linking agent, form a layer of film on the surface of instant tea powder, avoid instant tea to expose when preserving in the air and reduced by the air oxidation drug effect, alginic acid can absorb moisture, makes instant tea keep dry, has also played the guard action to active ingredient among them when prolonging the shelf life. And alginic acid makes the taste of the weight-reducing tea fresh and sweet, plays a role in inhibiting appetite and does not increase blood sugar.

Detailed Description

The following is a detailed description of the embodiments of the present invention, but the present invention is not limited to these embodiments, and any modifications or substitutions in the basic spirit of the embodiments are included in the scope of the present invention as claimed in the claims.

Example 1

1. Mixing and crushing 11 parts of rhizoma polygonati and 20 parts of rhizoma polygonati in parts by weight, adding deionized water, extracting for 15min by a subcritical fluid extraction method at the temperature of 21 ℃ and under the condition that the material-liquid ratio is 1:2 to obtain extract liquor, and sterilizing the extract liquor by using ultraviolet rays with the wavelength of 255nm for 40s to obtain auxiliary liquid;

2. after the green tea is placed at 4 ℃ for half a year, 60 parts by weight of the green tea is taken, and the auxiliary liquid is uniformly sprayed on the green tea under the conditions of 20 ℃ of temperature and 67% of humidity until the auxiliary liquid is absorbed to be slightly moist;

3. squeezing 11 parts by weight of lotus leaves, 5 parts by weight of semen cassiae and 12 parts by weight of sophora flowers by a machine to obtain plant liquid and plant residues, adding water with the same weight into the plant residues, decocting for 1 hour, filtering, taking filtrate, mixing the plant liquid and the filtrate to obtain mixed liquid, adding 11% by weight of plant protease and pectinase in a ratio of 1.5:1 into the mixed liquid, performing enzymolysis for 55 minutes, then performing microwave radiation for 7s at a frequency of 1100W to inactivate the enzyme, eluting by a silica gel column, and concentrating to half of the volume to obtain a plant extract;

4. superfine grinding tea leaves, dissolving the tea leaves in a plant extract, drying the tea leaves in vacuum to obtain primary tea powder, dissolving 12 parts by weight of alginic acid in 2 times of citric acid with the concentration of 7 percent, adding the primary tea powder, heating the mixture to 52 ℃, dripping 2 percent of calcium lactate into the mixture, continuously reacting for 1.5 hours, concentrating, drying and crushing the mixture to obtain the instant weight-reducing tea.

Example 2

1. Mixing and crushing 21 parts by weight of rhizoma polygonati and 28 parts by weight of radix polygonati officinalis, extracting for 15min by using ethanol, standing for 1h for phase splitting, taking an extract phase, and heating at the high temperature of 150 ℃ for 4s for instant sterilization to obtain an auxiliary liquid;

2. placing oolong tea at 10 deg.C for half a year, taking 50 parts by weight of green tea, and uniformly spraying adjuvant liquid on oolong tea at 18 deg.C and 75% humidity until the adjuvant liquid is absorbed to slightly moisten oolong tea;

3. cutting 14 parts by weight of lotus leaves, 8 parts by weight of semen cassiae and 17 parts by weight of sophora flowers into juice to obtain plant liquid and plant residues, adding water with the same weight into the plant residues, decocting for 1 hour, filtering, taking filtrate, mixing the plant liquid and the filtrate to obtain mixed liquid, adding 12% by weight of plant protease and pectinase in a ratio of 1.5:1 into the mixed liquid, carrying out enzymolysis for 45 minutes, heating to 60 ℃ for enzyme deactivation, eluting by using a macroporous resin column, and concentrating to half of the volume to obtain a plant extract;

4. superfine crushing tea leaves, dissolving the tea leaves in a plant extract, vacuum drying to obtain primary tea powder, dissolving 14 parts by weight of alginic acid in 2 times of acetic acid with the concentration of 5%, adding the primary tea powder, heating to 55 ℃, dripping 3% of calcium chloride, continuously reacting for 1.5h, concentrating, drying and crushing to obtain the instant weight-reducing tea.

Example 3

1. Mixing and crushing 9 parts by weight of rhizoma polygonati and 12 parts by weight of rhizoma polygonati, adding dimethyl ether, extracting for 10min by a subcritical fluid extraction method at the temperature of 17 ℃ and under the condition that the material-liquid ratio is 1:1.5 to obtain extract liquor, and then introducing ozone to sterilize the extract liquor to obtain auxiliary liquid;

2. after the black tea is placed at 6 ℃ for half a year, 70 parts by weight of green tea is taken, and auxiliary liquid is uniformly sprayed on the black tea under the conditions of temperature of 22 ℃ and humidity of 65% until the auxiliary liquid is absorbed to be slightly moist;

3. carrying out ultrasonic treatment on 7 parts by weight of lotus leaves, 3 parts by weight of semen cassiae and 5 parts by weight of sophora flowers to obtain plant liquid and plant residues, adding water with the same weight into the plant residues, decocting for 1 hour, filtering, taking filtrate, mixing the plant liquid and the filtrate to obtain mixed liquid, adding 5% by weight of plant protease and pectinase in a ratio of 1.5:1 into the mixed liquid, carrying out enzymolysis for 70 minutes, then carrying out enzyme deactivation by ultrasonic radiation for 15s at 35KHz, adding a flocculating agent for flocculation and precipitation, filtering by a ceramic membrane, and concentrating the filtrate to half of the volume to obtain a plant extract;

4. superfine crushing tea leaves, dissolving the tea leaves in a plant extract, vacuum drying to obtain primary tea powder, dissolving 10 parts by weight of alginic acid in 1.5 times of tartaric acid with the concentration of 7%, adding the primary tea powder, heating to 50 ℃, dripping 1% of calcium phosphate, continuously reacting for 1h, concentrating, drying and crushing to obtain the instant weight-reducing tea.

Example 4

1. Mixing and crushing 18 parts by weight of rhizoma polygonati and 26 parts by weight of radix polygonati officinalis, extracting for 20min by using normal hexane, standing for 1.5h for phase splitting, taking an extract phase, and sterilizing under the pressure of 120MPa for 10s to obtain an auxiliary liquid;

2. placing green tea at 4 deg.C for half a year, taking 53 parts by weight of green tea, and uniformly spraying adjuvant liquid on green tea at 20 deg.C and 68% humidity until the adjuvant liquid is absorbed to slight degree;

3. pulping 8 parts by weight of lotus leaves, 5 parts by weight of semen cassiae and 10 parts by weight of sophora flowers, filtering to obtain plant liquid and plant residues, adding water with the same weight into the plant residues, decocting for 1 hour, filtering, taking filtrate, mixing the plant liquid and the filtrate to obtain mixed liquor, adding 10% by weight of plant protease and pectinase in a ratio of 1.5:1 into the mixed liquor, performing enzymolysis for 60 minutes, performing microwave radiation for 10s at a frequency of 1000W to inactivate enzyme, eluting by using a silica gel column, and concentrating to half of the volume to obtain a plant extract;

4. superfine crushing tea leaves, dissolving the tea leaves in a plant extract, vacuum drying to obtain primary tea powder, dissolving 11 parts by weight of alginic acid in 2 times of citric acid with the concentration of 4%, adding the primary tea powder, heating to 52 ℃, dripping 2% of calcium carbonate, continuously reacting for 1.5h, concentrating, drying and crushing to obtain the instant weight-reducing tea.

First, drug safety experiment

Acute toxicity test

1. Materials and methods

1.1 animals: selecting healthy and active mice with the body fat rate 5-15% higher than the normal body weight range, dividing the mice into two groups, wherein each group comprises 5 females, one group comprises an experimental group, and the other group comprises a control group. Wherein, the normal weight range refers to mice with the weight of 18-22 g.

The tested drugs are: the weight-reducing tea is prepared by the method of example 1, and the obtained weight-reducing tea is brewed by boiled water according to the volume ratio of 1: 20.

1.2 Experimental methods

Referring to the research guidelines of new traditional Chinese medicines, in a laboratory at the room temperature of 23 ℃, mice are repeatedly pre-tested to be infused with 50g/kg of weight-reducing tea, the toxic reaction and death condition of the mice are observed for one week, half of lethal dose cannot be measured, and the maximum tolerance is selected for testing.

The weight of the mice is taken as the standard, the stomach is drenched once every 12h according to the dosage of 0.3ml/g, and the mice in the experimental group are drenched continuously for one month; the control group is fed with clear water, both water and foraging freely, the state of the mouse is observed during the period of feeding the weight-reducing tea and after stopping feeding for two weeks, and the health condition of the mouse is judged through items such as blood collection and analysis, organ tissue biopsy and the like.

1.3 results of the experiment

The instant weight-reducing tea for gastric lavage of mice has no death in one month, no abnormality in eating and drinking water, different weight reduction degrees and good mental state of the mice.

Secondly, the content of tea polyphenol of different tea leaves which are respectively placed at 4 ℃ for different time is measured and counted by a spectrophotometry, and the result is shown in table 1.

TABLE 1

Item

1 day

7 days

1 month

3 months old

6 months old

9 months old

Green tea

172.7mg/g

162.5mg/g

144.3mg/g

123.1mg/g

84.9mg/g

77.1mg/g

Oolong tea

158.4mg/g

139.1mg/g

120.9mg/g

101.7mg/g

77.4mg/g

72.3mg/g

Black tea

135.9mg/g

112.5mg/g

93.7mg/g

81.3mg/g

75.1mg/g

69.6mg/g

The experimental results show that the content of tea polyphenol of the tea leaves decreases with the time after the tea leaves are placed, and the speed of the decrease becomes slower after the tea leaves are placed for half a year, so the tea leaves placed for half a year are selected to prepare the weight-reducing tea.

Screening experiment

Screening experiments are carried out on the raw materials of the diet tea formula, the dosage of each medicinal material is the same as that in example 1, experiments are carried out according to the experimental method of toxicity experiments, the change rate of the body weight and the visceral fat index of a mouse after one month are recorded and compared with those in example 1, and the results are shown in table 2.

Wherein, experiments 1-3 remove lotus leaf, cassia seed and sophora flower to prepare the weight-reducing tea respectively; experiment 6-7 the auxiliary liquid is replaced by rhizoma Polygonati decoction and rhizoma Polygonati Odorati decoction to prepare weight reducing tea;

visceral fat index (i.e. visceral fat area (cm))²)/10cm²

TABLE 2

Thirdly, the diet tea prepared in experiment 6 and experiment 7 is respectively researched, the macrophage activity of the mouse and the proliferation degree of the splenocytes in vitro of the mouse are recorded and compared with the example 1, and the results are shown in table 3;

experiment 8: under the same conditions as those in example 1, the amount of rhizoma polygonati is changed to 30 parts to prepare weight-reducing tea for experiments;

experiment 9: under the same conditions as those in example 1, the amount of polygonatum odoratum was changed to 35 parts to prepare diet tea for experiments;

experiment 10: under the same conditions as those in example 1, sealwort was removed to prepare diet tea for experiments;

experiment 11: under the same conditions as those in example 1, the polygonatum odoratum was removed to prepare diet tea for experiments;

the experimental method comprises the following steps:

1. the mouse macrophage RAW264.7 cell line is cultured and subcultured, and the cells are added into the examples

1. The final concentration of the diet tea prepared in experiments 7 and 8 was 250mg/L, and the survival rate of RAW264.7 cells was measured by MTT method and SRB method.

2. The neck of the mouse is dislocated to death, spleen tissues are taken under the aseptic condition to prepare spleen cell suspensions, the weight-reducing tea prepared in the example 1, the experiment 7 and the experiment 8 is respectively added to ensure that the final concentration is 5.5mg/mL, the mixture is shaken overnight, and the content of IFN-gamma secreted by the spleen cells of the mouse is measured.

Wherein the blank group is added with normal saline.

TABLE 3

According to experimental results, the weight-reducing tea prepared from the sealwort water decoction and the polygonatum water decoction has no great influence on the survival rate of RAW264.7 cells, but the activity of splenocytes is relatively low; after the dosage of the sealwort and the polygonatum is increased, the survival rate of phagocyte of the mouse is influenced; only sealwort or polygonatum odoratum is used for having no influence on the survival rate of phagocyte of mice and also on the proliferation activity of splenocytes in vitro of the mice. The experimental result shows that the weight-reducing tea prepared by matching rhizoma polygonati and radix polygonati officinalis can improve the survival rate of phagocyte, promote spleen cells to proliferate and secrete IFN-gamma, and further improve the immunity of the organism.

Fourth, experiment 12 the measurement of the content of the instant tea after standing for one day, one month and three months, respectively, without coating the instant tea, and the comparison with example 1 in which the instant tea was left for the same period of time, are shown in table 4.

Wherein, the contents of rutin and quercetin are measured by a standard curve method;

the content of saponin and the clearance rate of the weight-reducing tea for eliminating DPPH activity are measured by an ultraviolet spectrophotometry.

Clearance (%) - (1- (A)₁-A₂)/A₀]*100％

In the formula: a. the₁Is the light absorption value A of the mixed diet tea and DPPH solution₂For the light absorption value of diet tea, A₀Absorbance of DPPH solution.

TABLE 4

It is known from the experimental results that the content of the effective components of the instant tea without coating decreases more rapidly than that of the instant tea with coating due to exposure to air after a period of time of standing.

Fifth, clinical experiments

(1) 100 persons with a BMI value of 24-26.9 were collected as a group 1, each person was taken two bags per day on a normal diet for four weeks, and after the intake was stopped, the observation was continued for two months, and the number of persons with a BMI value and a visceral fat index returning to the normal range was recorded, and the results are shown in Table 4.

(2) 100 obese people (age span 20-60 years) with BMI between 27 and 29.9 were collected and scored as group 2, each person took two bags per day, had a normal diet, continued for four weeks, had two months of observation after discontinuation of the intake, and recorded the number of people with BMI and visceral fat index returning to the normal range, with the results shown in Table 4.

Wherein the visceral fat index is normal at 1-9, high at 10-14, high at 15-29, and high at or above 30.

Lean when BMI is less than 18.5, normal 18.5-23.9, fat 24-26.9, fat 27-29.9, and severe fat greater than or equal to 30.

Visceral fat index (i.e. visceral fat area (cm))²)/10cm²

BMI weight/height square (kg/square meter)

TABLE 4

Claims

1. An instant weight-reducing tea is characterized by comprising tea leaves and plant extracts.

2. The instant diet tea of claim 1, wherein said tea leaves are pre-treated.

3. The instant diet tea as claimed in claim 2, wherein the pre-treatment is carried out by standing the tea leaves at 0-12 ℃ for half a year, spraying the auxiliary liquid on the tea leaves under constant temperature and humidity until the auxiliary liquid is absorbed to slightly moisten the tea leaves.

4. The instant diet tea as claimed in claim 3, wherein the auxiliary liquid is prepared by pulverizing rhizoma Polygonati and rhizoma Polygonati Odorati, extracting, and sterilizing.

5. The instant diet tea as claimed in claim 4, wherein said sterilization includes but is not limited to radiation sterilization, heat sterilization, autoclaving.

6. The instant diet tea as claimed in claim 1, wherein the plant extract is obtained by physically crushing and filtering plant materials to obtain plant liquid and plant residues, decocting and filtering the plant residues with water to obtain filtrate, mixing the plant liquid and the filtrate to obtain a mixed solution, and purifying the mixed solution.

7. The instant diet tea as claimed in claim 6, wherein the plant material comprises, in parts by weight: 7-14 parts of lotus leaves, 3-8 parts of cassia seeds and 5-17 parts of sophora flowers.

8. The instant diet tea as claimed in claim 6, wherein the purification treatment is enzymolysis, enzyme deactivation, impurity removal and purification treatment of the mixed solution.

9. The preparation method of the instant diet tea is characterized by comprising the following steps:

a. micronizing folium Camelliae sinensis, dissolving in plant extract, and vacuum drying to obtain primary tea powder;

b. and (4) coating the primary tea powder.

10. The method for preparing instant diet tea as claimed in claim 9, wherein said coating treatment is carried out by applying alginic acid to the surface of tea powder under heating condition through cross-linking agent to form a protective film.