جستجوی مقالات مرتبط با کلیدواژه « چای سبز » در نشریات گروه « پزشکی »

Episiotomy is one of the common methods used to widen the pelvic outlet, and it is associated with complications such as pain and bleeding. Green tea and Myrtus communis are two medicinal plants with anti-inflammatory and pain-relieving properties. The present study was conducted with aim to investigate the effect of Myrtus communis extract and green tea on pain reduction and episiotomy wound healing.

This three-blind randomized clinical trial study was conducted in 2020-2021 on 90 primiparous women referred to the maternity ward of Shushtar Al-Hadi and Ganjovian Dezful hospitals. The samples were randomly treated in groups receiving green tea, Myrtus communis extract ointment and placebo for 14 days. Evaluation of the wound healing status was done with Rida index and pain intensity by VAS. Data analysis was done with SPSS software (version 23) and Mann-Whitney and Friedman tests. P<0.05 was considered statistically significant.

There was a significant difference among the three investigated groups in the Rida index on the 14th day, and this index was lower in the Myrtus communis group than in the green tea group and the placebo group (P=0.001). VAS index on the 14th day had a significant difference among the three investigated groups, and this index was lower in the Myrtus communis group than in the green tea group and the placebo group (P=0.001).

The use of Myrtus communis ointment and green tea extract can reduce pain intensity and improve heal episiotomy wound, and it seems that the effect of Myrtus communis ointment is more than green tea ointment and placebo.

Regular exercise along with the consumption of green tea and green coffee exertanti-diabetic, anti-inflammatory, anti-fibrotic, and anti-obesity properties in addition to containing antioxidant compounds. This study aims to investigate the effect of eight weeks of progressive aerobic activity along with consumption of green tea and green coffee on fat oxidation and blood pressure in overweight girls.

This research was carried out using a semi-experimental method and a clinical trial in the form of pre-test and post-test. Accordingly, 48 people were invited to participate in the briefing session using Morgan's table. Participants were randomly divided into four experimental groups 1 (exercise + green coffee, 12 people), experimental group 2 (exercise + green tea, 12 people), experimental group 3 (exercise + green coffee + green tea, 12 people), and control group 4 (exercise, 12 people). One day after taking blood in the first stage and measuring physical and physiological indicators in all four groups, the subjects participated in progressive aerobic exercises three days a week for eight weeks. In addition to progressive aerobic training, the experimental groups received green tea or green coffee or both depending on the experimental group for eight weeks.

The statistical operation of the indicators in the research showed that there is no significant difference in the variables of systolic blood pressure, diastolic blood pressure, HDL, LDL, and total cholesterol between the four groups. However, body weight, body mass index, body fat percentage, waist to hip ratio,and triglyceride, the differences between the four groups were significant.

The combination of progressive aerobic exercise, green tea, and green coffee supplements led to a significant change in the indicators studied in the current research onoverweight girls. Obese and overweight women can improve their body composition and general health by combining progressive aerobic exercises and consuming green tea and green coffee supplements.

 Asthma is a chronic inflammatory disease characterized by respiratory symptoms, variable airway obstruction, airway hyperresponsiveness, and airway inflammation. In the present study, a review of the effect of exercise and antioxidant supplements in patients with asthma has been discussed.

 Using several databases including Google Scholar, Web of Science, Science Direct, PubMed, and Scopus, and using the titles of asthma and the names of their types and related names for the keywords of asthma until 2022, a search was made. At first, by limiting the search, irrelevant and repeated studies were removed, and after reviewing the titles, abstracts, and full texts, suitable studies were included in the current research.

 Focusing on studies that focused on the effects of exercise and antioxidant supplements in patients with asthma, it can be said that exercise in these patients through pathophysiological mechanisms has been able to play a role in reducing the harmful effects of asthma. So that regular aerobic and breathing exercises are recommended to improve this disease. Also, the lung tissue of asthmatic patients is exposed to oxidative stress due to the production of reactive oxygen and nitrogen species. For this reason, taking into account the reduction of antioxidant enzymes, we will see an increase in apoptosis, the loss of airway epithelial cells, and a decrease in airway regeneration. Therefore, studies have pointed to the positive role of antioxidants in patients with asthma.

Periodontal is a group of inflammatory diseases that can cause tooth loss. This study investigated two types of mouthwash, chlorhexidine and green tea of the Irsha and Colgate brands to patients with moderate chronic periodontitis based on gingival factors, including gingival index (GI) and sulcus bleeding index (SBI).

Ninety patients were divided into three equal groups: chlorhexidine, Colgate green tea, and Irsha green tea. The sampling patients were randomly selected among adults with moderate chronic periodontitis. The SPSS statistical software (version 22) was used for data analysis. An independent t-test was used to investigate the significant difference between treatment groups and paired t-test was used to assess the significance of GI and SBI parameters before and after treatment with mouthwash in each group of patients. P-values less than 0.05 indicated significant differences between the groups.

There was no significant difference between the chlorhexidine and Colgate green tea groups regarding the GI index (P=0.023). However, Irsha green tea has significantly reduced the GI index compared to chlorhexidine (P=0.025) and Colgate green tea (P=0.021). In addition, the statistical results did not show a significant difference between chlorhexidine and Colgate green tea in terms of the SBI index (P=0.116). However, Irsha green tea has significantly reduced the SBI index compared to chlorhexidine (P=0.003). The amount of SBI index in the two green tea brands was similar (P=0.445).

The effectiveness of Colgate green tea mouthwash in reducing GI and SBI index was similar to chlorhexidine; however, the effect of Irsha green tea mouthwash on these indices was significantly less than that of chlorhexidine mouthwash. Between the two brands of green tea, no noticeable changes in the reduction of the SBI index were observed.

Many studies have been done on the effects of ginseng and green tea on inflammatory factors and liver enzymes, but no research has yet studied the comparative effects of ginseng and green tea extracts with Pomeol Breuler on C-reactive protein (CRP) and liver enzymes in hyperlipidemic rats. This study was done to evaluate the effects of ginseng and green tea extracts in comparison with Pomeol Bruler on CRP and liver enzymes in hyperlipidemic rats.

In this experimental study, 42 male Wistar rats were randomly allocated into 7 groups. Animals in group 1 (control group) received a normal diet. The experimental groups 2-7 received a high-fat diet for a month. The groups were treated with the extract for 8 weeks and by intraperitoneal injection. Groups 1 and 2 received 77.5 mg/kg/day and 155 mg/kg/day green tea extract, respectively. Groups 3 and 4 received 103.3 mg/kg/day and 206.6 mg/kg/day ginseng extract, respectively. Group 5 received 0.16 g/kg/day of Pomeol Bruler, and group 6 received green tea extract (155 mg/kg/day) and ginseng extract (206.6 mg/kg/day). At the end of the treatment, the level of CRP and liver enzymes including aspartate transaminase (AST) and alanine transaminase (ALT) were measured.

The level of CRP was significantly reduced in the rats treated with ginseng, green tea, and Pomeol Bruler compared with the control group (P<0.05). The level of AST and ALT did not differ significantly between the ginseng, green tea, Pomeol Bruler, and control groups.

The combined use of ginseng and green tea with Pomeol Breuler for 8 weeks may reduce inflammatory factors but does not affect liver enzymes.

Staling is one of the main causes of reduced bread shelf life. In this study, the effect of using green tea hydroalcoholic extract as a beneficial herbal compound on dough rheological properties and staling of barbari bread was investigated.

In order to prepare the hydroalcoholic extract, first, green tea was extracted with 30% ethanol and then concentrated and powdered by spray dryer. The product was subjected to qualitative analysis and then was added at the 0, 0.5, 1.5, 2.5 and 3.5% concentrations (based on flour weight) in the formulation of consumable dough followed by performing the dough rheological properties and bread quality tests, staling, bread crumb hardness (by TPA device) and the samples thermal properties (by DSC device) were evaluated in one, three and five days after cooking.  

The results of dough rheological tests showed that the green tea hydroalcoholic extract increased flour quality and improved the dough rheological properties and also, increased the moisture and total polyphenol contents in bread, at all concentrations. In all three time periods, 0.5 and 1.5% treatments had the highest soft tissue as compared to other treatments and the control samples. The results of thermal properties indicated that 1.5% treatment reduced the starch retrogradation in the short- term (one day after baking) and possibly long-term (more than five days after baking).

In this study, green tea hydroalcoholic extract acts as an oxidizing improver and improved the dough rheological properties, and also, 0.5 and 1.5% treatments had the most effect on reduces the bread crumb hardness by delaying the staling of barbari bread.

Sedentary life style increases risk of cardiovascular diseases (CVDs). Physical activity and green tea supplementation can reduce cardiovascular risk factors by improving inflammation and body composition. The aim of study was to determine benefits of 8 weeks of spinning training and green tea supplementation on risk factors cardiovascular and body composition in overweight women.

A total 32 overweight women based on BMI (Body Mass Index) (27.1±1.6) and (24.9±3.6 years) were randomly divided into three groups: Spinning+green tea (n=11), spinning+placebo (n=11) and control (placebo +no training) (n=10). Training groups carried out 8 weeks of spinning training with an intensity of 11-17 Rating of Perceived Exertion (RPE). Blood sampling were obtained 48 h before starting the interventions and then 48 h after last training session. Serum concentration of hs-CRP (high sensitive C-reactive protein) and blood level of fibrinogen were measured. In addition, BMI and BF% (Body fat percent), bioelectrical impedance analysis was performed.

After 8 weeks of interventions only hs-CRP was significantly decreased in spinning+green tea group (P=0.005). In addition, fibrinogen (P=0.001), BF% (P=0.001) and BMI (P=0.001) were significantly decreased in both training groups. Also, there was significant difference of hs-CRP in the training groups (P=0.028). However, no significant difference of fibrinogen and BF% were observed between the training groups. In the case of fibrinogen both spinning+green and spinning+placebo groups had a significant difference with control group (P=0.004), (P=0.014) respectively. Regarding BF% and BMI only a significant difference wera between the spinning+green and control (P=0.006), (P=0.007) respectively.

It seems that spinning training has improved risk factors of cardiovascular and body composition. Indeed, green tea supplementation has increased the effectiveness of spinning training.

The aim of this study was to investigate the radiation protective effect of daily oral consumption (for one week/one month) and single oral dose of green tea extract against gamma irradiation in mice.

This study was performed on 60 adult male Balb/c mice weighing 25 to 30 gr in 6 equal groups. These groups include control, only irradiated, daily consumption of 200 mg/kg of green tea extract for one week and without irradiation, irradiated group after consumption of 200 mg/kg extract for one week, irradiation after 200 mg/kg oral consumption of green tea extract for one month, and irradiation 2 hours after eating 800 mg/kg of green tea extract.

The results demonstrated that the oral consumption of green tea extract before irradiation significantly decreased MnPCE (51% decrease, P<0.0001) and MnNCE (28% decrease, P<0.05), and increased PCE/PCE + NCE ratio (12% increase, P<0.0001) compared to the only-irradiated group. The percentage of DNA in tail and apoptotic comets decreased significantly with consuming green tea extract (continues or single dose) (P<0.001).

Oral consumption of green tea extract in both single and continuous doses had radiation protection significantly, and these effects were more in the case of continuous consumption than single consumption.

Intensive resistance trainings cause the production of many free radicals and pre-inflammatory cytokines in athletes and military personnel. These factors may cause many complications for the athlete. In recent years, the use of anti-inflammatory compounds made of herbal extracts has been considered to reduce these inflammatory factors. The purpose of this study was to evaluate the effect of green tea extract on inflammatory cytokines caused by endurance trainings in athletes.

This study was conducted on 36 male athlete. Their individual characteristics including height, weight, body mass index were measured. Subjects (N=36) were randomly divided into three groups. The first group did their exercises without any supplement or medication. The green tea extract and the placebo were used along with the TRX training in group two and three respectively. Serum levels of IL-6 and TNF-α inflammatory factors were evaluated by ELISA method in all groups.

Serum levels of TNF-α and IL-6 in the group with green tea extract supplement along with the training was reduced in comparison with the placebo and training group. This decrease was not statistically significant in terms of TNF-α, but it was significant for IL-6 factor.

The results of the present study indicate that the use of green tea extract along with intense resistance training in athletes can reduce the production of some cytokines and thus reduce inflammatory injuries among them.

Candida-albicans is a normal floor and one of the opportunistic pathogens in the oral cavity. There are various treatments for this infection, including nystatin. Considering the high potential of plant extracts, including green tea, in the field of antimicrobial activity, this study was designed to investigate the effect of green tea extract on Candida albicans species.

Initially, the aqueous-alcoholic extract of green tea at different concentrations was prepared. Broth micro dilution method was used to determine the MIC. From the contents of different wells containing less concentrations of green tea and no candidate growth was observed, 10 micro liter of dextrose agar substrate was removed and the lowest amount of green tea, which showed less growth was considered as minimum fungicidal concentration (MFC). Also, 50% and 100% green tea extracts of the discs were prepared to determine the size of the growth medium in the culture medium. Data analyzed using STATA software 14. 

MIC and MFC for green tea extract start at a concentration of 256 mg / ml. It was also found that the inhibition zone was equal to zero in both concentrations of 50% and 100% for the green tea extract.

It seems, green tea has antifungal effect in very high concentration rather than oral usage and also, as mouthwash and just with direct contact.

Obesity is a complex multifactorial disease. The worldwide prevalence of overweight and obesity has doubled since 1980 to an extent that nearly a third of the worldchr('39')s population is now classified as overweight or obese. On the other hand, sports scientists have suggested exercise to prevent further spread of this epidemic. In addition to exercise, the use of natural fat-burning supplements such as green tea was able to attract a lot of people. But recently, white tea in some domestic and foreign research was able to show that like green tea and even better, it will have the potential to burn fat. Therefore, it can be suggested that researchers fill the scientific gap by conducting more research on the comparison of green and white tea and its effects on obesity-related indicators.

 Green tea contains modarats quantities of natural antioxidants and bioactive compounds. Due to the fact that the synthetic antioxidants might have adverse effects on human health, the applications of natural compounds that have been consumed by man are performed.

 In this research the extract of the green tea was isolated and examined for total phenolic content using folin-ciocalteav method. The extract was investigated for antioxidant activity using free radical scavenging (DPPH), discolouration of the beta carotene-linoleic acid and the oxidative stability index methods. In the following, tea extract and lecithin were added to the beef-tallow at the concentrations 100, 300, 600 and 900 ppm and 0.1, 0.3 and 0.5% and combined 900 ppm lecithin + 0.5% tea extract ،600 ppm lecithin + 0.5% tea extract respectively. The peroxide value, free fatty acid and oxidation stability index of the tea extract and lecithin containing samples and the control sample were compared.

 The results indicated that green tea extract at the concentration of 600 ppm showed a good activity that was equivalent to Butylated hydroxytoluene (BHT), the synthetic antioxidant. The synergistic activity of the added phospholipids and the natural antioxidant present in green tea indicated that the activity was concentration dependent concerning the synergist.

 It might be concluded that application of tea extract in lecithin improves the combination with oxidative of stability of beef-tallow.

Aging is associated with impaired biological function, leading to various diseases, including diabetes, hypertension, and cardiovascular failure. Regular aerobic exercise and green tea extract with antioxidant properties can reduce the effects of aging. This study aims to investigate the effect of 12 weeks of aerobic exercise and consumption of green tea extract on the levels of Bax and Bcl-2 proteins in the heart tissue of aged male rats.

32 aged male rats were randomly divided into 4 groups: control, exercise, supplement, and exercise+ supplement. Exercise groups performed aerobic exercise at an intensity of 60-75% of vo2peak for 12 weeks and 5 days per week; meantime, the supplementary groups consumed green tea extract. The immunohistochemistry method was used to measure the expression of Bax and Bcl-2. Data were analyzed by ANOVA and Tukey's post-hoc test. The significance level was considered p<0.05. Statistical analysis was performed using Spss 24 software.

The results showed that Bax expression was significantly lower in the exercise group ((p=0.031)), supplement group ((p=0.002)), and exercise + supplement group ((p=0.000)) than the control group. Also, Bcl-2 expression was significantly higher in the exercise+ supplement group ((p=0.036)) than in the control group.

According to the results, a combination of 12 weeks of moderate-intensity aerobic exercise with green tea extract supplementation can decrease the expression of cardiac Bax and ratio of Bax to Bcl-2 than aerobic exercise and green tea supplementation alone.

Garlic (Allium sativum) belongs to the Liliaceae family and green tea (Camellia sinensis) belongs to the Theaceae family are widely used in folk medicine. Antibacterial, anticancer and antioxidant activity of these plants have been previously reported. This study aimed to investigate the cytotoxic activity of the extracts of garlic and green tea on breath cancer cell line (MCF-7) and HDF.

Cytotoxicity of different concentrations (250,500,750 μg/ml) of garlic and green tea ethanolic extracts on MCF-7 and HDF cell lines were examined. The cell lines were grown in RPMI supplemented with 10% FBS, 1% penicillin and streptomycin. The cells were allowed to incubate at 37ºC in an atmosphere that contained 5% CO2 and 95% humidity. The standard MTT assay was performed to estimate cell viability after treatment garlic and green tea extracts.

The results of the MTT assay showed that garlic extract had time and concentration dependent anticancer activities on the MCF- 7 cell line (P<0.01). But, any effect of green tea extract on MCF-7 and HDF cell lines showed.

Results of this survey suggested that garlic extract has a good potential to control of cancer cells.

The incidence of heart disease increase with age. Green tea is an antioxidant which can prevent cellular aging. Therefore, the present study aims to investigate the effect of 12 weeks of green tea extract consumption on total antioxidant capacity (TAC), malondialdehyde (MDA) levels and superoxide dismutase, glutathione peroxidase and catalase activity of old ratschr('39') heart tissue in response to acute exhaustive exercise.

32 male rats were randomly categorized into two groups of supplement and non-supplement each consisting of 16 rats. The supplement group received green tea extract for 12 weeks. At the end of the 12 weeks, each of these groups was further divided into two groups of rest and acute exhaustive exercise. The non-supplement with the rest group was called control group. The non-supplement with exercise group was called exercise group. Further, the supplement group with the rest was called supplement group and finally the last group was entitled supplement with exercise. After 12 weeks of taking green tea extract, one session of acute exhaustive exercise was held on the treadmill. Sandwich ELISA method was used to measure TAC and MDA content and superoxide dismutase, glutathione peroxidase and catalase activity

The results showed that 12 weeks of green tea extract consumption increased TAC and decreased MDA levels. Furthermore, increased superoxide dismutase, glutathione peroxidase and catalase activity in response to a bout acute exhaustive exercise.

According to the results of this study, 12 weeks of green tea extract consumption can increase TAC levels and increase the activity of antioxidant enzymes at rest and after acute exhaustive exercise.

Recurrent aphthous stomatitis (RAS) is a common oral disease, which presents as painful and recurrent single or multiple ulcers in the oral mucosa. This condition is an idiopathic disease and has no definitive cure; accordingly, it is very important to find a drug to control the disease. Since green tea is a rich source of antioxidant and has an anti-inflammatory effect, this study was aimed to determine the effect of a mucoadhesive paste, containing green tea extract, on RAS.

This double-blind, placebo-controlled clinical trial was conducted on 52 patients with RAS. The study population was randomly divided into two groups of intervention (using a mucoadhesivepaste containing green tea extract) and placebo (using a mucoadhesive paste without drug). They used mucoadhesive paste three times a day for 10 days. Pain severity was measured based on the visual analog scale at the beginning of the study (day zero) and 1, 6, and 10 days post-intervention. In addition, the lesion size was measured using a probe. The data were analyzed in SPSS software (version 21) using two-way repeated measures ANOVA.

According to the results, pain and recovery time were significantly lower in the intervention group than in the control group (p < /em>< 0.05). However, the ulcer size did not show any statistically significant difference between the two groups over time (p < /em>> 0.05).

As the findings indicated, the use of mucoadhesivepaste, containing green tea extract, can reduce the pain severity and healing time of RAS. However, it was not effective in reducing the size of lesions.

Cardiovascular disease, especially coronary heart disease, is one of the leading causes of death in women. This study aimed to evaluate the effect of eight weeks of aerobic exercise in the water with and without consumption of green tea on some blood coagulation factors in inactive postmenopausal women.

The present study is quasi-experimental. 27 obese and inactive postmenopausal women were randomly divided into three groups: exercise group (9 subjects with a mean weight of 68.93±9.1 kg), supplement group (8 subjects with a mean weight of 84.9±17.5 kg) and exercise+supplement group (10 individuals with mean weight of 73.73±10.1 kg). The aerobic exercise program was performed for 8 weeks, 3 sessions per week, and each session for 45-60 minutes with an intensity of 55-75% of maximum heart rate. The supplement group received 200 ml of green tea 3 times daily for 8 weeks. Before and after the training and supplementation protocol, blood samples were collected and changes in plasma fibrinogen levels, platelet count, PT, and PTT were measured. For data analysis, SPSS software version 16 was used at a significance level of p<0.05.

Based on the research findings, changes in PT variables and platelet count were not significant in any of the three groups (p<0.05). Fibrinogen increased in all three groups, which was significant only in the green tea group. PTT decreased in all three groups, which was significant in the green tea group.

Consumption of green tea in the present study increases blood coagulation. Given the importance of blood homeostasis and the adverse effects of disturbing the balance of coagulation and fibrinolysis systems, it seems that any supplementation should be analyzed in terms of its effect on hemostatic balance and the activity of its subsystems.

No study compared the effectiveness of the green tea, fiber, caffeine and L-carnitine on weight loss in individuals. Therefore, the aim of this study was to evaluate the efficacy of green tea, fiber, caffeine and L-carnitine in clinical aspects of people.  

The databases of Pubmed, Scopus and Cochran were searched up to November 2018. The pairwise method was used to compare the difference between the mean weight loss of drugs in two direct methods (comparison of drugs with the control group) and non-direct (Compare medications together).

The present study performed on 73 clinical studies with a cumulative population of 3921, showed that caffeine (-0.88 kg; -2.60 to -0.84), caffeine + catechine (-0.74 kg; -1.70 to 0.21), green tea (-0.61 kg; -1.33 to -0.11), fiber (-0.31 kg; -0.79 to -0.17), respectively, had the most effect on weight loss compared with the placebo group. In addition, carnitine supplementation did not effect on weight loss.

The present study indicated that green tea supplementation had a lower effect on weight loss compared with caffeine and caffeine+catechin, and had a greater effect on weight loss compared with fiber and carnitine.

What is known about obesity Obesity occurs for many reasons, including heredity, poor nutrition, hormonal problems and the environment (inactivity). For this reason, after obesity or overweight, people decide to return to their previous ideal weight by using fat-burning supplements. Primarily, green tea has been ranked as a fat burner and supplement for many years. Of course, it is not possible to use sports supplements without doing sports activities. For this reason, the use of sports supplements along with sports activities with appropriate intensity and duration can cause very significant changes in body composition. There are many fat burning supplements that have a long-term negative effect on the body due to their chemical nature. For this reason, obese people are looking for natural fat burning supplements. In recent years, plants have been able to have significant effects on fat oxidation. Meanwhile, tea after water is one of the most widely consumed natural plants in the market, which has very few negative effects. Tea consumption in the world is typically 120 ml per day. The mechanisms of action of tea in relation to obesity include: increased hepatic metabolism, caffeine synergy, decreased appetite, exothermic stimulation and increased enzymes associated with fat burning .Among teas, green tea is one of the most popular natural herbal supplements in fat burning that most people around the world use this tea to increase fat oxidation. The main ingredients of most teas are epicatechin, epigallocatechin, epicatechin gallate and epigallocatechin gallate. There are four main types of tea that are produced depending on the type of processing, which include green, white, black and oolong tea. Studies have shown that oolong tea and black tea can both increase fat oxidation in obese and overweight people. But this fat burning effect is less than green tea. For this reason, extensive research has been done on green tea and its effect on fat oxidation, and researchers have been able to conclusively report that this tea can be a beneficial fat supplement. Meanwhile, several studies have been able to prove that white tea has more fat-burning substances than green tea. For this reason, it is possible that white tea is much more useful than most fat-burning teas. The naming of white tea by this name is due to the white silver villi of the immature buds of the tea plant, which gives it a white appearance, although its brew is pale yellow. In very limited research on laboratory mice, researchers have reported that white tea affects adipose tissue lipolysis. But so far, no research has been done on humans that in Iran for the first time the effect of white tea on fat oxidation in obese people was discussed. In this study, subjects poured 10 grams of white tea in 500 ml of boiling water and brewed it one hour before exercise. Finally, the researchers reported that consuming white tea one hour before exercise could increase fat oxidation in obese people. Therefore, according to the only current research on humans and similar animal research, this study examines the effects and compounds of white tea. In this review study, articles with the keyword’s green tea, obesity, green tea and fat oxidation, green tea compounds, effects of green tea compounds, white tea, white tea and fat oxidation, white tea and weight loss, white tea compounds were selected. 120 articles related to the present study were found. Then, out of 120 articles, 43 articles did not correspond to the present study, so they were removed from the study. Finally, 77 articles in this review study were discussed by researchers.

Obesity is on the rise and the search for a beneficial supplement to improve fat oxidation is becoming increasingly important. The present study showed that tea can be prescribed as a plant and a healthy beverage for obese people to reduce body fat percentage. Also, in this specialized study, it was found that the ingredients of white tea are the same as green tea, with the difference that in some compounds, the amount of substances that affect fat oxidation is higher. This factor may raise the question of whether white tea can be superior to fat tea and other teas in fat oxidation. The necessity of this study is that due to the unfamiliarity of white tea and the anonymity of its ingredients, by doing this study, a new way will be opened for future researchers and researchers will show significant results with initial studies. Researchers can compare the effects of green and white tea on fat oxidation in both the short and long term to provide the results of this valuable tea. It is also possible to study the effects of this tea compared to other fat burners such as caffeine or other supplements at different times such as morning and evening and determine the best time to consume it. The strength of this review study was that it was able to first examine the importance of green tea through short-term and long-term research tables and then focus on past research on white tea, breaking down the ingredients of this tea. One of the weaknesses of this article was that due to the extensive search; The authors were able to find very little research on white tea. For this reason, it cannot be said with certainty that white tea can be 100% superior to green tea. But based on the study of its ingredients, it can be concluded that it can probably be superior to other teas in fat oxidation. Finally, this study states that white tea as a natural fat burner can be useful in the process of fat oxidation. But the consumption of this tea should be influenced by exercise in order to have significant effects on fat oxidation. Long-term exercise and consumption of green tea could play an important role in increasing oxidation. It is therefore probable; White tea can be used in long-term sports activities and have better effects. Therefore, these results can play a decisive role in directing future selective strategies to improve body composition and weight loss

No study compared the effectiveness of the green tea, fiber, caffeine and L-carnitine on weight loss in individuals. Therefore, the aim of this study was to evaluate the efficacy of green tea, fiber, caffeine and L-carnitine in clinical aspects of people.Design: The databases of Pubmed, Scopus, Google Scholar and Cochran were searched up to November 2018. The pairwise method was used to compare the difference between the mean weight loss of drugs in two direct methods (comparison of drugs with the control group) and non-direct (Compare medications together).

The present study performed on 73 clinical studies with a cumulative population of 3921, showed that caffeine (-0.88 kg; -2.60 to -0.84), caffeine + catechine (-0.74 kg; -1.70 to 0.21), green tea (-0.61 kg; -1.33 to -0.11), fiber (-0.31 kg; -0.79 to -0.17), respectively, had the most effect on weight loss compared with the placebo group. In addition, carnitine supplementation did not effect on weight loss.

The present study indicated that green tea supplementation had a lower effect on weight loss compared with caffeine and caffeine+catechin, and had a greater effect on weight loss compared with fiber and carnitine.