جستجوی مقالات مرتبط با کلیدواژه « Herbal tea » در نشریات گروه « پزشکی »

Polycystic ovary syndrome (PCOS) is a common metabolic disorder among age reproductive women. It could result in anovulation, infertility insulin resistance, and obesity. Dietary intake especially antioxidant components may improve some disorders. The current study is the first meta-analysis to assess the effect of green tea, a source of antioxidants, on anthropometric and insulin among women with PCOS.

In this meta-analysis, the databases of PubMed/Medline, Scopus, Cochran, and Web of Science were searched up to March 2019. The I-square (I2), a statistical measure of heterogeneity, was used to assess the heterogeneity. Egger's test was used for the assessment of publication bias.

Green tea reduced weight -3.07 kg (-6.53 to -0.44, P = 0.03), fasting insulin -0.50 mIU/l -3.72 (-5.16 -2.28, P = 0.001), waist to hip ratio (WHR) -0.04 (-0.06 to -0.017, P = 0.001), body mass index -0.32 to kg/cm2 (-1.63 to 1, P = 0.09), and body fat percentage -1.13(-5.30 to 3.04, P = 0.51).

The green tea supplement has some mild decreasing effect on weight, WHR, and fasting insulin significantly. It seems green tea could improve weight and glycemic control in women with PCOS.

Echium amoenum is most commonly used herb after tea with high nutritional values. The purpose of this research was to produce Echium amoenum herbal tea, enriched by Malva and Althaea rosea var. nigra, in order to enhance the sensory properties and antioxidant activity of herbal tea.

In this study, antioxidant activity of alcoholic extract was evaluated by DPPH method. The turbidity was determined using spectrophotometer at 800 nm wavelength. Total ash, insoluble ash in acid, moisture content and sensory evaluation were performed according to the national standard methods. The moisture content of the whole samples was higher than the standard range for Echium amoenum. Therefore, for better grinding, the Echium amoenum will be dried again before the packaging process to remove additional moisture absorbed from the environment.

The results showed that all samples had high antioxidant activity, but the sample containing 0% of the Malva, 30% of Althaea rosea var. nigra and 35% of Echium amoenum showed the most radical inhibition properties (95.04%) (p <0.05). Also, in sensory evaluation, this sample had the highest point with a significant difference (p <0.05) compared to other samples. So, it can be concluded that such a combination of studied herbs is suitable for preparation of herbal tea with high antioxidant and acceptable sensory properties.

 The results of this study showed that the use of Echium amoenum and Althaea rosea var. nigra can produce herbal tea as a new product, with high antioxidant and desirable sensory properties.

Polycystic ovary syndrome (PCOS) is a common endocrine and metabolic disorder. Recently, the tendency towards complementary therapies such as using herbs with anti-androgenic effects has been increased. This study reviewed the documents related to the effect of four types of herbal teas on the treatment of PCOS based on the literature review.
The searched databases included ISI, PubMed, Google Scholar, Scopus, Science Direct, Cochrane library, International Clinical Trials registry, MedLib, Society for Information Display (SID), Iranian Registry of Clinical Trials (IRCT), IranMedex and Magiran,. The databases were searched for the clinical trials without any time limit and using English and Persian key terms included “polycystic ovarian syndrome”, “herbal therapy”, and “herbal medicine”.
Among 104 randomized controlled trials (RCTs) about the effects of herbal medicines on the treatment of PCOS, only four studies were conducted on diverse types of tea. The results of one study on the effects of mint tea revealed a significant reduction in the total and free testosterone levels in the intervention group (P0.05). Likewise, there was no significant alteration in the serum hormone levels in both groups (P>0.05). Another clinical trial determined the same effects ofusing Stachys lavandulifolia and hormone therapy. Accordig to another study, the level of dehydroepiandrosterone-sulphate (DHEA-S) significantly dropped after treatment with marjoram tea (P=0.05).
The positive effects of various types of herbal teas on PCOS has been reported in different trials; however, further RCTs are recommended with larger sample size and prolonged duration.

The aim of this study was to evaluate the effect of six herbal teas on the color stability of two types of nanohybrid and one microhybrid resin composite.
70 disc-shaped specimens, 210 in total (7*2mm), were fabricated from each of the following materials in metal mould : Tetric N ceram, Grandio, Gradia Direct Anterior. Specimens were stored in distilled water at 37°C for 24 hours in an incubator for completion of polymerization. After baseline evaluation (L*, a*, b*CIELAB scale), the specimens were divided into seven subgroups, according to the test and control storage solutions (n=10). Randomly selected specimens from each material were immersed in 20 ml of the test solutions (Borago, Green, Hibiscus, Thyme, Black and Lemon Verbena teas) at 37˚c for 24 hours and 48 hours. Solutions were refreshed every 24 hours. All samples were polished using Soflex discs with Medium, Fine, Superfine grit after storage in herbal teas. Specimens color was measured in 24, 48 hours and after polishing. The collected data was statistically analyzed using two-way analysis of variance with repeated measure and Tukey’s HSD at a significance level of 0.05.
All samples displayed color changes after immersion in the herbal teas. Hibiscus tea induced the highest level of discoloration after 24 hours immersion in all three composites. Black tea induced highest level of discoloration in (Grandio ΔE=7.44). Hibiscus tea and Thyme tea induced highest level of discoloration in (Tetric N ceram ΔE=11.) and (Gradia Direct ΔE=14.11), respectively, after 48 hours immersion. The least discoloration was found with Borage tea in 24 and 48 hours. After re-polishing the color change was reduced. Grandio showed the greatest color reduction in Black tea. Color improvement of Tetric N ceram was better than Gradia Direct.
All tested restorative materials showed a color shift after immersion in herbal teas, which Tetric N ceram displayed the highest color change in Hibiscus tea and Borago tea induced lowest discoloration on Grandio after 24 h immersion. Thyme tea induced the highest level of discoloration on Gradia Direct and least discoloration was found in Borago tea on Grandio after 48 hours immersion.

One of the important reasons behind termination of breast-feeding in the first six months after childbirth is insufficient production of breast milk.. The aim of this study was to determine the effect of herbal tea containing fenugreek seed on the signs of breast milk sufficiency in Iranian girl infants aged 0 - 4 months, at the medical health centers of Tehran university of medical sciences..Patients and This study was a clinical trial with a control group. Seventy-eight girl infants, 0 - 4 months old that were exclusively breastfed by their mothers, were randomly assigned to the intervention group (received herbal tea containing 7.5 g fenugreek seed powder in addition to 3 g of black tea, three times a day) and the control group (received herbal tea containing 3 g of black tea powder, three times a day). Before and during the four weeks of study, the signs of breast milk sufficiency were evaluated through measurement of growth parameters and use of follow-up forms for measuring the number of wet diapers in one day, frequency of defecation and infant breast-feeding times in a day.. Before the intervention there was no significant difference between weight, height, head circumference, the number of wet diapers and frequency of defecation between the two groups (P > 0.05), yet the number of breast feeding times of the control group was more than the Fenugreek group. At the end of the fourth week in proportion to the pre-intervention conditions, the weight of the infants in the fenugreek group increased significantly from 5282.0513 ± 1021.51121 to 6383.0769 ± 952.06190, while head circumference increased from 38.3103 ± 1.62736 to 39.9256 ± 1.50660, number of wet diapers from 5.2821 ± 0.93044 to 8.1648 ± 1.20620, frequency of defecation from 1.8846 ± 1.08495 to 2.7326 ± 0.94771 and the number of breast feeding times from 9.1795 ± 1.39778 to 15.9597 ± 1.45056 (P < 0.001). However, there was no significant effect on height variation (P = 0.078). While in the control group there was no significant difference between the mentioned variables (P > 0.05).. Herbal tea of fenugreek seed in comparison to the control group improves the signs of breast milk sufficiency..

Breastfeeding is an economic and valuable method to protect infant''s health during the life and provides unique biological and emotional effects for mothers and infants.. This study aimed to determine the effect of herbal tea containing Fennel seed on breast milk sufficiency signs and growth parameters of Iranian infants in medical health centers of Tehran University of Medical Sciences, Tehran, Iran..Patients and This study was a randomized clinical trial performed on 78 girl infants aged 0-4 months who were exclusively breastfed. After getting informed consent infants were randomly assigned into the intervention group (received herbal tea containing 7.5 g Fennel seed powder in addition to 3 grams black tea three times a day) and the control group (received herbal tea containing 3 grams black tea powder three times a day). Before and during four weeks of study, signs of breast milk sufficiency were evaluated through measuring the growth parameters and the number of wet diapers in a day, frequency of defecation and infant breastfeeding times.. Before intervention, there was no significant difference between weight, height, head circumference, the number of wet diapers and frequency of defecation times between the two groups (P > 0.05), but the number of breastfeeding times of control group was more than the Fennel group. After fourth weeks, Fennel significantly increased weight from (5261.0256 ± 1167.65801) to (6393.3333 ± 1083.42132), head circumference from (38.6103 ± 2.20033) to (40.1538 ± 2.00510), the number of wet diapers from (5.5000 ± 1.05131) to (8.5421 ± 1.21182), the frequency of defecation times from (1.7692 ± 1.03139) to (2.6410 ± 1.14655) and the number of breastfeeding times from (9.9359 ± 1.85380) to (16.7399 ± 1.63766) (P < 0.001), but it had no effect on height (P = 0.066).. Herbal tea containing fennel seed improved breast milk sufficiency signs..

The aim of this study was to analyze the impact of green tea on dentin erosion. Twelve extracted sound human premolars were im-mersed in Coca Cola with a pH of 2.8 for 5 minutes. The surface microhardness was measured with a Knoop diamond under a load of 50gr/10s. The teeth were immersed in green tea (Camellia sinensis) solution for one minute. The micro-hardness values were measured again and compared with pretreatment values by the Wilcoxon test. Three eroded teeth, which were treated with green tea, were evaluated under scanning electron microscope. The mean ± SD of microhardness values before and after immersion in green tea were 46.5±2.79 and 54.5±4.4, respectively with statistically significant differences between the two measurements (P<0.01). In SEM evaluation there was an improvement in eroded dentin appearance and there were deposits on the dentin surface. Green tea (Camellia sinensis) increased the microhardness of eroded dentin and improved the eroded texture.