Insights & Discussion
Green tea and its chief bioactive component have the potential to improve certain female reproductive disorders such as endometriosis, polycystic ovary syndrome, and dysmenorrhea.
The study reviews the beneficial effects of green tea and its major bioactive component on female reproductive disorders, focusing on endometriosis, polycystic ovary syndrome (PCOS), and dysmenorrhea. The research highlights the role of catechins, phenolic compounds found in tea, which have been known for their health benefits due to their high antioxidative properties. The green tea or its derivative works on endometriosis through anti-angiogenic, anti-fibrotic, anti-proliferative, and proapoptotic mechanisms.
In the discussion of results, it was found that green tea not only enhances ovulation and reduces cyst formation in PCOS, but it also ameliorates generalised hyperalgesia, reduces plasma corticosterone levels, and mitigates uterine contractility in dysmenorrhea. Despite the promising findings, the study acknowledges the need for more comprehensive clinical trials to fully translate these findings into clinical practice.
Discover Related Insights
Green tea supplementation can significantly reduce body weight in women with polycystic ovary syndrome, hence potentially beneficial in its clinical management.
2022 Nutrition Research Green tea promotes weight loss in women with polycystic ovary syndrome: Systematic review and meta-analysis Colonetti L, Grande AJ, Toreti IR, Ceretta LB, da Rosa MI, Colonetti T
Meta-Analysis Body Weight Green Tea Obesity
The research carried out was a systematic review of randomized controlled trials that focused on women with polycystic ovary syndrome, examining the effects of green tea supplementation versus a placebo. Relevant studies were sourced from electronic databases such as MEDLINE via PubMed, EMBASE via Elsevier, Cochrane Library, LILACS via BVS, and Web of Science using specific terms related to the illness and green tea. Criteria for the evaluation included effects on body weight, fasting insulin, body mass index, body fat percentage, daily caloric intake, waist and hip circumference, and the waist/hip ratio.
Among the studies considered, there were a total of 169 women, with 85 allocated to the green tea group and 84 to the placebo group. It became apparent that there was a significant reduction in body weight for the group that received green tea supplementation. This leans towards the potential of green tea to be beneficial in the management of this syndrome.
Green tea and its component EGCG, demonstrate potential as a treatment for endometriosis by inhibiting growth, invasion, adhesion and angiogenesis.
2021 Critical Reviews in Food Science and Nutrition Therapeutic effects of green tea on endometriosis Chen X, Man GCW, Hung SW, Zhang T, Fung LWY, Cheung CW, et al.
Review Article Anti-Inflammatory Antioxidant EGCG
The main research methodology of this work is a narrative review. The paper comprehensively collects and reviews various preclinical studies that propose the use of green tea as a potential treatment for endometriosis. These studies explore the diverse biological properties and activities of green tea and its major bioactive component, (-)-epigallocatechin gallate, including anti-angiogenic, anti-proliferation, anti-metastasis, and apoptosis induction functions. Different potential mechanisms used by green tea to inhibit the growth of endometriosis are considered, such as its effects on inflammation, oxidative stress, invasion, adhesion, and apoptosis.
The discussion of the reviewed data highlights the potential therapeutic effects of green tea acting on different molecular and cellular mechanisms in endometriosis. The researchers keenly discussed how green tea exhibited an inhibitory effect on the disease through multiple avenues, including reducing inflammation and oxidative stress, preventing tumor invasion and adhesion, promoting apoptosis (cell death), and limiting angiogenesis (the development of new blood vessels) - all these factors contribute to the growth and progression of endometriosis. The discussion elaborates on the significant roles and wider implications of these processes in understanding and potentially treating endometriosis.
Tea supplements, especially green tea, significantly decrease fasting blood glucose and fasting insulin levels and reduce body weight in women with polycystic ovary syndrome.
2021 Frontiers in Endocrinology Effects of Tea Consumption on Anthropometric Parameters, Metabolic Indexes and Hormone Levels of Women with Polycystic Ovarian Syndrome: A Systematic Review and Meta-Analysis of Randomized Controlled Trials Shen W, Pan Y, Jin B, Zhang Z, You T, Qu Y, et al.
Meta-Analysis Blood Sugar Body Weight Green Tea
The researchers conducted a systematic review and meta-analysis by searching published literature in different databases from 1985 to September 2021. The data from randomized controlled trials were extracted to assess the effectiveness of tea versus placebo in women with polycystic ovary syndrome. Weighted mean differences were pooled using a random-effects model. A total of six trials with 235 participants were included in this review.
The study resulted in finding that consumption of tea supplements improved body weight, fasting blood glucose, and fasting insulin more significantly when compared with a placebo. Notably, green tea was effective on body weight, fasting insulin, fasting blood glucose, and certain reproductive hormone indexes. The therapy was also found to be safely tolerated by the patients. It's important to note that tea had significant effects on fasting blood glucose and hormone levels in trials with intervention duration of 3 months or more. Differences were noticed among Asian and Caucasian PCOS patients regarding the effect of tea on weight and fasting insulin.
Green tea consumption leads to weight loss and decreased levels of fasting insulin and free testosterone in overweight women with polycystic ovarian syndrome.
2017 Journal of Education and Health Promotion Effect of green tea on metabolic and hormonal aspect of polycystic ovarian syndrome in overweight and obese women suffering from polycystic ovarian syndrome: A clinical trial Tehrani HG, Allahdadian M, Zarre F, Ranjbar H, Allahdadian F
Randomised Controlled Trial Green Tea Obesity PCOS
In the research methodology, a two-group, double-blind, randomized clinical trial was conducted among 60 overweight women with polycystic ovarian syndrome in Isfahan. The participants were randomly classified into two groups, one receiving green tea (the experimental group) and the other receiving a placebo (the control group). Comparisons of levels of free testosterone hormones and fasting insulin were made at the start of the study and 12 weeks later, along with measurements of participant weight before and after the study.
Discussing the results, the comparison showed no initial significant difference in participant weight, fasting insulin or free testosterone levels between the two groups. However, after the 12-week period, notable differences were observed. The green tea group showed significant weight loss and declines in both fasting insulin and free testosterone levels compared to the placebo group.