阅读说明：本技术 减肥茶及其制备方法 (Weight-reducing tea and preparation method thereof ) 是由 丁世仓 张长禄 王洪 于 2021-07-29 设计创作，主要内容包括：本发明提供一种减肥茶及其制备方法,属于保健饮品技术领域,以重量份数计,制成所述减肥茶的有效成分的原料包括：荷叶30～40份、玫瑰花18～22份、牛蒡根15～18份、菊花12～15份、冬瓜仁8～12份、决明子8～12份和陈皮8～12份。本发明以荷叶、玫瑰花、冬瓜仁、牛蒡根、菊花、决明子和陈皮为原料,具有刮油去脂之功效。本发明对消化和吸收系统无任何副作用,能够促进人体正常的新陈代谢；本发明在减肥的同时具有降低血脂和降低胆固醇的效果,可以排毒养颜,美白皮肤,还可以防止动脉硬化等疾病；本发明的减肥效果明显,可长期食用,是一种安全健康的减肥茶,便于大规模的推广。(The invention provides weight-reducing tea and a preparation method thereof, belonging to the technical field of health-care drinks, wherein the weight-reducing tea comprises the following active ingredients in parts by weight: 30-40 parts of lotus leaves, 18-22 parts of roses, 15-18 parts of burdock roots, 12-15 parts of chrysanthemum, 8-12 parts of white gourd seeds, 8-12 parts of cassia seeds and 8-12 parts of dried orange peels. The invention takes lotus leaves, roses, wax gourd seeds, burdock roots, chrysanthemum, cassia seeds and dried orange peels as raw materials and has the effects of oil scraping and fat removing. The invention has no side effect on the digestion and absorption system, and can promote the normal metabolism of the human body; the weight-losing tea has the effects of reducing blood fat and cholesterol, expelling toxin, beautifying, whitening skin and preventing diseases such as arteriosclerosis and the like; the weight-reducing tea has an obvious weight-reducing effect, can be eaten for a long time, is safe and healthy, and is convenient for large-scale popularization.)

1. The weight-reducing tea is characterized in that the raw materials for preparing the effective components of the weight-reducing tea comprise the following components in parts by weight: 30-40 parts of lotus leaves, 18-22 parts of roses, 15-18 parts of burdock roots, 12-15 parts of chrysanthemum, 8-12 parts of white gourd seeds, 8-12 parts of cassia seeds and 8-12 parts of dried orange peels.

2. The method for preparing diet tea according to claim 1, wherein the method for preparing diet tea comprises the steps of:

1) soaking and decocting lotus leaves, semen cassiae and dried orange peel to obtain a leaching solution I;

parching semen Benincasae, soaking with radix Arctii, and decocting to obtain extractive solution II;

adding chrysanthemum into warm water with the pH value of 3.5-4.5, soaking, and decocting to obtain chrysanthemum leaching liquor;

percolating flos Rosae Rugosae with 90-95% ethanol to obtain ethanol filtrate and flos Rosae Rugosae residue;

decocting the residue with water to obtain extractive solution;

2) and mixing the leaching liquor I, the leaching liquor II, the chrysanthemum leaching liquor, the ethanol filtrate and the rose leaching liquor, uniformly mixing, concentrating into thick paste, adding a flavoring agent, and uniformly mixing to obtain the weight-reducing tea.

3. The preparation method of the diet tea as claimed in claim 2, wherein the weight ratio of the rose flower to 90-95% ethanol is 1: 4-5.

4. The method for preparing diet tea according to claim 2 or 3, wherein before percolation, the rose is further pulverized.

5. The method for preparing diet tea according to claim 2 or 3, wherein the warm water used for soaking chrysanthemum is adjusted in pH with hydrochloric acid.

6. The preparation method of the diet tea according to claim 2 or 3, wherein the temperature of the warm water for soaking the chrysanthemum is 30 to 40 ℃.

7. The preparation method of the diet tea according to claim 2 or 3, wherein the chrysanthemum is soaked for 8 to 12 hours and decocted for 0.5 to 1 hour.

8. The method for preparing the diet tea according to claim 2 or 3, wherein the flavoring agent is honey.

9. The preparation method of the diet tea according to claim 2 or 3, wherein the lotus leaf, the cassia seed and the tangerine peel are soaked for 10-15 min and decocted for 20-25 min.

10. The preparation method of the diet tea according to claim 2 or 3, wherein the soaking time of the white gourd seed and the burdock root is 30-40 min, and the decocting time is 1-2 h.

Technical Field

The invention relates to functional tea, in particular to weight-reducing tea and a preparation method thereof.

Background

With the acceleration of the pace of life in modern society and the increase of life pressure, most of the time is occupied by work and remuneration, people are lack of exercise more and more, and the phenomenon of obesity is more and more. Obesity is a chronic metabolic disease caused by various factors, and is characterized by abnormal increase in the percentage of body fat to body weight due to increase in the volume and cell number of fat cells in the body and excessive deposition of fat in some parts. The fat distribution of the whole body of a simple obese patient is uniform, the endocrine disorder phenomenon and the metabolic disturbance disease do not exist, and the family of the simple obese patient often has the history of obesity. In order to deal with the phenomenon of obesity, various methods such as diet, diet therapy, sports, acupuncture, massage, weight-reducing medicines and weight-reducing tea are developed in various crowds, the diet and the weight-reducing medicines can cause harm to human bodies, the diet therapy and the sports are difficult to insist on, the acupuncture and the massage are easy to rebound and need to go to specific places, and therefore the weight-reducing tea harmless to the human bodies is more easily accepted by people.

At present, the commonly used traditional Chinese medicine weight-reducing tea is prepared by adopting materials such as wax gourd, lotus leaf, cassia seed and the like and baking at low temperature, is generally brewed by hot water, has poor taste, can dissolve out less effective components after being soaked for a long time, has slight weight-reducing effect after being taken for a long time, and is difficult to persist in taking.

Disclosure of Invention

Aiming at the problems, the invention provides the weight-reducing tea and the preparation method thereof.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

the weight-reducing tea comprises the following raw materials of effective components in parts by weight: 30-40 parts of lotus leaves, 18-22 parts of roses, 15-18 parts of burdock roots, 12-15 parts of chrysanthemum, 8-12 parts of white gourd seeds, 8-12 parts of cassia seeds and 8-12 parts of dried orange peels.

A preparation method of the weight-reducing tea comprises the following steps:

1) soaking and decocting lotus leaves, semen cassiae and dried orange peel to obtain a leaching solution I;

parching semen Benincasae, soaking with radix Arctii, and decocting to obtain extractive solution II;

adding chrysanthemum into warm water with the pH value of 3.5-4.5, soaking, and decocting to obtain chrysanthemum leaching liquor;

percolating flos Rosae Rugosae with 90-95% ethanol to obtain ethanol filtrate and flos Rosae Rugosae residue;

decocting the residue with water to obtain extractive solution;

2) and mixing the leaching liquor I, the leaching liquor II, the chrysanthemum leaching liquor, the ethanol filtrate and the rose leaching liquor, uniformly mixing, concentrating into thick paste, adding a flavoring agent, and uniformly mixing to obtain the weight-reducing tea.

Furthermore, the weight ratio of the roses to 90-95% ethanol is 1: 4-5.

Further, before percolation, the rose flowers are also crushed.

Furthermore, the warm water used for soaking the chrysanthemum is hydrochloric acid for adjusting the pH value.

Furthermore, the temperature of warm water for soaking the chrysanthemum is 30-40 ℃.

Furthermore, the chrysanthemum is soaked for 8-12 hours, and the decoction time is 0.5-1 hour.

Further, the flavoring agent is honey.

Further, the lotus leaves, the cassia seeds and the dried orange peels are soaked for 10-15 min and decocted for 20-25 min.

Further, the white gourd kernel and the burdock root are soaked for 30-40 min and decocted for 1-2 h.

The weight-reducing tea and the preparation method thereof have the beneficial effects that:

the invention takes lotus leaves, roses, wax gourd seeds, burdock roots, chrysanthemum, cassia seeds and dried orange peels as raw materials, and has the effects of oil scraping and fat removing;

the lotus leaves are neutral in nature and bitter in taste, enter liver channels, spleen channels and stomach channels, have the effects of clearing summer-heat, resolving dampness, raising hair, clearing yang, cooling blood and stopping bleeding, have the effects of reducing fat and losing weight, lowering blood pressure, resisting oxidation and removing free radicals, belong to heat-clearing and blood-cooling medicines classified under heat-clearing medicines, and are used for treating summer-heat polydipsia, summer-heat damp diarrhea, spleen deficiency diarrhea, blood heat hematemesis and epistaxis, hematochezia metrorrhagia and metrostaxis;

the rose is warm in nature, sweet in taste and slightly bitter in taste, enters liver and spleen channels, has the effects of promoting qi circulation, resolving stagnation, regulating blood and relieving pain, belongs to qi-regulating medicines, and is used for treating liver-stomach disharmony, hypochondriac pain and epigastric distress, gastral cavity distending pain, irregular menstruation, premenstrual breast distending pain, traumatic injury, stasis swelling pain and the like; meanwhile, the rose contains volatile oil, the main components in the oil comprise beta-citronellol, eugenol, geraniol, quercetin, ephedrine, cyanidin, heptanal, citronellal and the like, and the volatile oil is volatilized to the air in the process of decocting or brewing the rose at high temperature;

the white gourd kernel is sweet in taste and slightly cold in nature, enters lung, spleen and large intestine channels, has the effects of clearing lung and eliminating phlegm, eliminating carbuncle and discharging pus, and removing dampness and promoting diuresis, and is used for treating phlegm-heat cough, pulmonary abscess and intestinal abscess, leukorrhagia with white turbidity, gonorrhea, edema and beriberi, but is taken with cautions for patients with deficiency-cold in spleen and stomach;

burdock root, cold in nature, pungent and bitter in taste, entering lung channel and stomach channel, has the efficacy of dispelling wind and heat, ventilating lung and promoting eruption, and reducing swelling and detoxifying, belongs to pungent and cool exterior-releasing medicines classified under exterior-releasing medicines, and is used for wind and heat type common cold, headache, cough, heat-toxin swelling and pain in the face, sore throat, swelling and pain of gum, rheumatalgia, abdominal mass, carbuncle, furuncle and malignant sore, hemorrhoid and rectocele, but is prohibited for patients with spleen deficiency and loose stool;

chrysanthemum, which is slightly cold in nature and sweet and bitter in taste, enters lung and liver meridians, has the efficacies of dispelling wind and clearing heat, calming liver and improving eyesight, belongs to the pungent and cool exterior-releasing medicines classified under exterior-releasing medicines, is used for treating wind-heat type cold, headache and dizziness, conjunctival congestion and swelling pain, dim eyes and dim eyes, but the diseases of qi deficiency and stomach cold, anorexia and diarrhea are less in use, and are contraindicated for patients with yang deficiency or headache and aversion to cold; meanwhile, the chrysanthemum is easy to discolor when being brewed or extracted by water, and the efficacy of the chrysanthemum is reduced because flavonoid substances contained in the chrysanthemum are easy to oxidize;

semen cassiae is slightly cold in nature and bitter and sweet in taste, belongs to liver channel, kidney channel and large intestine channel, has the effects of clearing heat, improving eyesight and relaxing bowel, belongs to deficiency-heat clearing medicines classified under heat clearing medicines, and is used for treating conjunctival congestion, swelling and pain, photophobia, lacrimation, nyctalopia, heat accumulation constipation, constipation due to intestinal dryness, dizziness and headache due to liver yang hyperactivity and the like caused by deficiency-fire upward attack or liver channel wind-heat and the like, but is taken with cautions for patients with spleen deficiency and loose stool;

the dried orange peel is pungent in taste, bitter in taste and warm in nature, enters spleen channels and lung channels, has the effects of regulating qi, stimulating appetite, eliminating dampness, reducing phlegm and treating spleen and stomach diseases, belongs to qi-regulating medicines, and is used with cautions for treating fullness in chest and epigastrium, anorexia, vomiting and excessive cough and phlegm, but cough due to yin deficiency and dryness, hemoptysis, hematemesis or excessive heat in the interior;

the lotus leaves are used as monarch drugs, so that the lotus leaf oil-removing ointment has the effects of resolving dampness, clearing yang, cooling blood and stopping bleeding, and achieves the effects of scraping fat and removing oil; the rose and the white gourd kernel are simultaneously used as ministerial drugs, the rose has the effects of promoting qi circulation and relieving depression, can regulate qi, accelerate blood circulation, promote dampness elimination and toxin expelling, enhance metabolism, regulate qi and blood while enhancing the effects of reducing fat and losing weight, and has the effects of regulating intestines and stomach and improving the cold property of the formula; the white gourd kernel has the effects of removing dampness and promoting diuresis and can strengthen the effects of scraping fat and removing oil; the burdock root, the chrysanthemum, the cassia seed and the dried orange peel are used as adjuvant medicines to promote the effects of scraping fat and removing oil; the monarch drug of the invention is lotus leaf neutral, and the four medicines of the white gourd seed, the burdock root, the chrysanthemum and the cassia seed are cold in nature, so that the formula presents cold and cool properties while promoting the effects of scraping fat and removing oil, and is easy to hurt the spleen and stomach, and is not beneficial to the patients with weak spleen and stomach; the ministerial drug rose and the adjuvant drug tangerine peel added into the weight-reducing tea can tonify the middle-jiao and harmonize the stomach, achieve the effect of regulating the middle-jiao and relieving urgency, neutralize the cold property of the drugs in the formula and keep the drug effect, so that the spleen and the stomach are not injured when the weight-reducing tea is taken, and the weight-reducing tea is suitable for various crowds to take;

the invention extracts the effective components in the traditional Chinese medicines to prepare the paste for internal administration, which is convenient for brewing and is beneficial to long-term adherence;

according to the honey-honey health care wine, honey is used as a flavoring agent, so that the taste is improved, the honey-honey health care wine has the effects of accelerating metabolism, protecting skin and beautifying, and meanwhile, the honey-honey health care wine can tonify middle-jiao and qi, invigorate spleen and nourish stomach, and is beneficial to the taking of patients with spleen and stomach weakness;

aiming at the problems that the dissolution rates of active ingredients in different traditional Chinese medicines are different, and partial active ingredients are volatile or go bad, the invention adopts different methods to treat different raw materials, and the decoction time is different, so as to extract the active ingredients in different traditional Chinese medicines to the maximum extent, and simultaneously effectively reduce the problems of volatile oil volatilization in roses and effective ingredient oxidation in chrysanthemum, so that the prepared paste has good weight-reducing effect;

the invention has the advantages of low cost of raw materials, simple production process and easy operation;

the invention has no side effect on the digestion and absorption system, and can promote the normal metabolism of the human body;

the weight-losing tea has the effects of reducing blood fat and cholesterol, expelling toxin, beautifying, whitening skin and preventing diseases such as arteriosclerosis and the like;

the weight-reducing tea has an obvious weight-reducing effect, can be eaten for a long time, is safe and healthy, and is convenient for large-scale popularization.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

Example 1A method for preparing diet tea

The embodiment is a preparation method of weight-reducing tea, and the specific preparation process comprises the following steps in sequence:

1) respectively taking lotus leaves, roses, burdock roots, chrysanthemum, white gourd seeds, cassia seeds and dried orange peels, cleaning, removing impurities and air-drying for later use;

taking 3.5kg of lotus leaves, 1.0kg of semen cassiae and 1.0kg of pericarpium citri reticulatae, adding cold water until the lotus leaves, the semen cassiae and the pericarpium citri reticulatae are immersed for 5cm, soaking for 15min, decocting for 20min, and filtering to obtain a leaching solution I;

parching 1.0kg semen Benincasae with slow fire until the surface is slightly yellow and has slightly focal spot, cooling, mixing with 1.5kg radix Arctii, adding water until the water level is 4cm higher than that of semen Benincasae and radix Arctii, soaking for 30min, decocting for 1.5 hr, and filtering to obtain extract II;

adding 1.2kg flos Chrysanthemi into 12L warm water at 35 deg.C, adding dropwise a small amount of 10 wt% hydrochloric acid water solution to adjust pH to 3.5, maintaining 35 deg.C, soaking for 12 hr, decocting for 0.5 hr, and filtering to obtain flos Chrysanthemi leaching solution;

pulverizing 2.0kg of flos Rosae Rugosae, adding into a percolator, percolating with 10kg of 90% ethanol for 4 hr to obtain ethanol filtrate, taking out flos Rosae Rugosae residue, adding water until the residue is 3cm higher than the residue, and decocting for 10min to obtain flos Rosae Rugosae leaching solution;

2) mixing the leaching solution I, the leaching solution II, the chrysanthemum leaching solution, the ethanol filtrate and the rose leaching solution, stirring and mixing uniformly, concentrating under reduced pressure to obtain thick paste with the relative density of 1.34, adding 0.5kg of honey, and mixing uniformly to obtain the pasty weight-reducing tea, which is marked as N1.

Example 2-6 preparation method of diet tea

Examples 2 to 6 are methods for preparing diet tea, and the steps are substantially the same as those in example 1, except for differences in process parameters, which are specifically shown in table 1:

TABLE 1 summary of the process parameters of examples 2 to 6

The contents of the other portions of examples 2 to 6 are the same as those of example 1.

Experimental example 1 trial drinking experiment of diet tea

The comparative example 1 is that 3.5kg of lotus leaves, 1.0kg of cassia seeds, 1.0kg of dried orange peels, 1.0kg of white gourd seeds, 1.5kg of burdock roots, 1.2kg of chrysanthemum and 2.0kg of rose are taken, and 0.5kg of honey powder is added to be uniformly mixed through a low-temperature baking process to prepare a tea bag, so that the weight-reducing tea D1 is obtained.

Comparative example 2, 3.5kg of lotus leaf, 1.0kg of cassia seed, 1.0kg of dried orange peel, 1.0kg of white gourd seed, 1.5kg of burdock root, 1.2kg of chrysanthemum and 2.0kg of rose are mixed, soaked for 12h and decocted for 1.5, the obtained leaching liquor is concentrated under reduced pressure into thick sticky paste, the relative density of the thick sticky paste is 1.34, 0.5kg of honey is added and mixed uniformly, and the weight-reducing tea D2 is obtained.

11) Toxicity test

C57BL/6(B6) of 6-8 weeks old and 80 mice (40 female and male) with the weight of 20g +/-3 g are taken and divided into 8 groups, 5 female and male groups are taken for each group, the weight reducing tea N1-N6 prepared in examples 1-6 and the weight reducing tea D1-D2 prepared in comparative examples 1-2 are respectively brewed by boiled water, the amount of the boiled water is calculated by the water consumption of normal tea making, wherein the weight reducing tea D1 only drinks tea, the rest weight reducing tea N1-N6 and D2 drink tea and solid mixture, the mixture is administrated according to the maximum allowable volume of the mice, and the given dose is 0.4g/10g and is continuously fed for 30 days. During the period of feeding the weight-reducing tea and 1 week after stopping feeding, the living state and the active diet of the white mice are observed, the appetite, the activity, the hair color, the mental state and the like of the white mice are normal, and the mice develop normally by identifying hematology, blood biochemistry, organ tissue structures and urine convention. All mice survive healthily without any toxic and side effect; liver function and organ tissue state were observed by dissection, and there was no difference compared with normal mice.

Experiments prove that the weight-reducing tea prepared by the invention has no toxic or side effect.

12) Animal fat-reducing and lipid-lowering experiment

121) Weight change

Taking 40 male mice with the age of 8-10 weeks, C57BL/6(B6) and the weight of about 25g, feeding the mice in an animal room with the temperature of 22 +/-2 ℃, feeding high-fat feed to induce the mice to be obese, establishing an obese mouse model, and then randomly dividing the mice into four groups, wherein each group comprises 10 mice, a control group is fed with the high-fat feed and sterile distilled water 10mL/kg, an experimental group 1 is fed with the high-fat feed and weight reducing tea N1 aqueous solution with the concentration of 0.1g/mL, an experimental group 2 is fed with the high-fat feed and the weight reducing tea D1 aqueous solution with the concentration of 0.1g/mL, an experimental group 3 is fed with the high-fat feed and the weight reducing tea D2 aqueous solution with the concentration of 0.1g/mL for 6 weeks continuously, accurately weighing the mice 1 time per week, and recording the weight change of the mice, and the specific table below:

table 2 table of weight changes of mice

Group of	Control group	Experimental group 1	Experimental group 2	Experimental group 3
					At the beginning	25.4±1.6a	25.0±1.0a	25.2±1.1a	25.3±1.4a
1 week	26.8±1.6b	25.2±0.7ab	25.8±1.6b	25.6±1.7b
					2 weeks	28.6±1.5c	25.6±0.5ab	26.6±1.9b	26.3±1.8b
3 weeks	30.6±1.8c	26.0±0.9ab	27.9±2.3b	27.6±2.4b
					4 weeks	31.4±1.7cd	26.4±0.8ab	28.8±2.6bc	28.5±2.5b
5 weeks	32.9±2.0d	26.9±0.7ab	29.7±2.3c	29.4±2.1b
					6 weeks	33.5±2.2d	27.5±0.9ab	31.1±2.1c	29.8±2.2b
Body weight gain value	8.1±1.6cd	2.5±0.7ab	5.9±1.7c	4.5±1.8b

As can be seen from Table 2, the weight gain values of the experimental groups 1-3 are obviously lower than those of the control group, and the weight gain value of the experimental group 1 is also obviously lower than those of the experimental group 2 and the experimental group 3, which shows that the weight-reducing tea has good weight-reducing effect.

122) Biochemical changes in blood:

the biochemical analysis of various biochemical values of the function of body fat which is not easy to form in vivo by blood is specifically as follows:

blood lipid: after each group of mice is weighed, fasting is carried out for 12 hours, isoflurane is used for anesthesia, artery blood in an abdominal cavity is collected, serum is obtained through centrifugal separation, and the concentration of triglyceride, cholesterol, low-density lipoprotein and high-density lipoprotein in the serum is analyzed and detected by a serum biochemical analyzer, which is specifically shown in the following table:

TABLE 3 summary of biochemical values of blood of mice

Group of	Control group	Experimental group 1	Experimental group 2	Experimental group 3
					Triglycerides (mg/dL)	269.7±26.2b	231.3±38.6ab	246.0±18.4ab	243.9±44.8ab
Cholesterol (mg/dL)	415.4±148.5b	276.7±88.1a	302.0±69.4a	292.1±87.5a
					Low density lipoprotein (mg/dL)	39.1±13.7c	9.9±6.2a	19.0±7.5b	13.9±7.4ab
High density lipoprotein (mg/dL)	158.3±13.3b	164.1±7.2bc	174.8±17.2c	168.4±13.9bc

As can be seen from Table 3, the concentrations of triglyceride, cholesterol, low-density lipoprotein and high-density lipoprotein in the experimental groups 1-3 are all lower than those of the control group, and the concentrations of triglyceride, cholesterol, low-density lipoprotein and high-density lipoprotein in the experimental group 1 are lower than those of the experimental group 2 and the experimental group 3, which shows that the weight-reducing tea has the effects of obviously reducing blood fat and cholesterol.

123) Change in body fat

After the abdominal artery blood sampling is finished, taking out the epididymis fat, the fat around the kidney and the intestinal fat in the peritoneal cavity for fine weighing, and calculating the body fat rate, wherein the body fat rate calculation formula is as follows:

the body fat rate is [ body fat mass (g)/body weight (g) ] x 100%, wherein the body fat mass (g) is liver peripheral fat (g) + spleen peripheral fat (g) + mesenteric fat (g) + kidney peripheral fat (g) + epididymal fat (g), and the specific results are shown in the following table:

TABLE 4 weight List of organs and body fat of mice

As can be seen from Table 4, the total fat amount and the body fat percentage of the experimental groups 1 to 3 are obviously lower than those of the control group, and the total fat amount and the body fat percentage of the experimental group 1 are also obviously lower than those of the experimental group 2 and the experimental group 3, which shows that the weight-reducing tea has good weight-reducing effect.

13) Trial drinking test

The diet tea N1 prepared in example 1 and the diet teas D1 to D2 prepared in comparative examples 1 to 2 were subjected to a drinking test.

Body Mass Index (BMI) weight (kg)/height according to internationally recognized calculation criteria²(cm²) BMI below 18.5, too light; BMI 18.5-25, normal; BMI 25-28, overweight; BMI 28-32, obesity; BMI above 32, very obese.

The trial drinking test disclosed that a total of 90 obese subjects (aged 18-60 years) with BMI between 28 and 32 were recruited, with half of the subjects in each case.

It should be noted that during the recruitment process, the recruited trial drinkers do not include pregnant women, women ready for pregnancy, and lactating women; those who are allergic to the ingredients of the present compositions; patients who are participating in other drug clinical trials; the patients in the disease state are discovered through comprehensive physical examination; suspected or certain abuse of alcohol, past history of drugs, etc.

The 90 obese people who participated in the trial drink were randomly divided into 3 groups, each of which was half male and half female. The diet tea N1 prepared in example 1 and the diet tea D1-D2 prepared in comparative examples 1-2 were taken in the first to third groups with water, and the trial drinking was performed for 2 months, and each person infused one bag per day, after which the therapeutic effect was observed and recorded.

The curative effect is evaluated by comparing the related symptoms of the trial drinker before and after treatment, wherein the effect is shown as follows: after continuous taking for 2 months, the body weight is reduced by more than 2 kilograms; the method has the following advantages: after 2 months of continuous taking, the weight is reduced by 1-2 kg; and (4) invalidation: after 2 months of continuous administration, the body weight was reduced by less than 1 kg or not.

The specific therapeutic statistics are as follows:

TABLE 5 Effect Listing of diet tea

Group of	Effective (human)	Display effect (human)	Invalid (human)	Total effective rate (%)
					First group	28	2	0	100
Second group	22	4	4	86.7
					Third group	23	4	3	90

As can be seen from Table 5, the efficacy of the weight-reducing tea prepared by the preparation method of the invention is obviously superior to that of the comparative example, which shows that the preparation method of the invention can furthest retain the active ingredients of each traditional Chinese medicine and is more beneficial to the efficacy of weight reduction.

14) Evaluation experiment

Newly recruiting 80 common consumers to perform sensory evaluation on the diet tea N1-N6 and D1-D2 by adopting an anonymous scoring mode, and respectively evaluating 4 indexes of color, smell, taste and overall preference, wherein the lowest score is 1, the full score is 10, and the higher score is better in effect. After tasting is finished, the sensory evaluation results of 80 common consumers are subjected to statistical analysis, and the average results are shown in the following table:

TABLE 6 summary of sensory evaluation results

Weight-reducing tea	Color	Smell(s)	Taste of the product	Overall preference
					N1	9.2	9.0	9.2	9.0
N2	9.1	8.9	8.7	8.9
					N3	8.8	9.0	8.7	9.1
N4	8.6	8.8	9.0	8.7
					N5	8.7	8.4	8.6	8.6
N6	9.0	8.8	8.7	8.7
					D1	8.1	5.3	3.8	4.8
D2	8.6	7.1	4.4	5.9

As can be seen from table 6, the diet tea prepared by the invention has good color, smell and taste, and high overall preference; the diet tea D1 and D2 had poor flavor and taste, and the overall preference was significantly low, and the above experiments also showed that the diet tea D1 and D2 had relatively poor therapeutic effects. Therefore, the weight-reducing tea prepared by the preparation method disclosed by the invention is high in sensory evaluation and good in curative effect.

It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.