A systematic review of the losing weight efficacy and safety of green tea catechins in slimming products

2011 ◽  
Author(s):  
Xiaoyun Li
Keyword(s):  
Systematic Review ◽  
Green Tea ◽  
Efficacy And Safety ◽  
Tea Catechins ◽  
Green Tea Catechins

scholarly journals Anti-Influenza with Green Tea Catechins: A Systematic Review and Meta-Analysis

Molecules ◽  
2021 ◽  
Vol 26 (13) ◽  
pp. 4014
Author(s):  
Anchalee Rawangkan ◽  
Kirati Kengkla ◽  
Sukrit Kanchanasurakit ◽  
Acharaporn Duangjai ◽  
Surasak Saokaew
Keyword(s):  
Systematic Review ◽  
Green Tea ◽  
Viral Infections ◽  
Influenza Infection ◽  
Meta Analysis ◽  
Influenza Virus Infection ◽  
Control Group ◽  
Tea Consumption ◽  
Tea Catechins ◽  
Green Tea Catechins

Influenza is one of the most serious respiratory viral infections worldwide. Although several studies have reported that green tea catechins (GTCs) might prevent influenza virus infection, this remains controversial. We performed a systematic review and meta-analysis of eight studies with 5,048 participants that examined the effect of GTC administration on influenza prevention. In a random-effects meta-analysis of five RCTs, 884 participants treated with GTCs showed statistically significant effects on the prevention of influenza infection compared to the control group (risk ratio (RR) 0.67, 95%CIs 0.51–0.89, P = 0.005) without evidence of heterogeneity (I2= 0%, P = 0.629). Similarly, in three cohort studies with 2,223 participants treated with GTCs, there were also statistically significant effects (RR 0.52, 95%CIs 0.35–0.77, P = 0.001) with very low evidence of heterogeneity (I2 = 3%, P = 0.358). Additionally, the overall effect in the subgroup analysis of gargling and orally ingested items (taking capsules and drinking) showed a pooled RR of 0.62 (95% CIs 0.49–0.77, P = 0.003) without heterogeneity (I2= 0%, P = 0.554). There were no obvious publication biases (Egger’s test (P = 0.138) and Begg’s test (P = 0.103)). Our analysis suggests that green tea consumption is effective in the prophylaxis of influenza infections. To confirm the findings before implementation, longitudinal clinical trials with specific doses of green tea consumption are warranted.

Green tea catechins and blood pressure: a systematic review and meta-analysis of randomised controlled trials

2014 ◽  
Vol 53 (6) ◽  
pp. 1299-1311 ◽  
Author(s):  
Saman Khalesi ◽  
Jing Sun ◽  
Nicholas Buys ◽  
Arash Jamshidi ◽  
Elham Nikbakht-Nasrabadi ◽  
...  
Keyword(s):  
Systematic Review ◽  
Blood Pressure ◽  
Green Tea ◽  
Randomised Controlled Trials ◽  
Meta Analysis ◽  
Controlled Trials ◽  
Tea Catechins ◽  
Green Tea Catechins ◽  
Randomised Controlled

scholarly journals Effect of green tea catechins with or without caffeine on anthropometric measures: a systematic review and meta-analysis

2009 ◽  
Vol 91 (1) ◽  
pp. 73-81 ◽  
Author(s):  
Olivia J Phung ◽  
William L Baker ◽  
Leslie J Matthews ◽  
Michael Lanosa ◽  
Alicia Thorne ◽  
...  
Keyword(s):  
Systematic Review ◽  
Green Tea ◽  
Meta Analysis ◽  
Anthropometric Measures ◽  
Tea Catechins ◽  
Green Tea Catechins

scholarly journals Effect of Acute and Chronic Dietary Supplementation with Green Tea Catechins on Resting Metabolic Rate, Energy Expenditure and Respiratory Quotient: A Systematic Review

Nutrients ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 644
Author(s):  
Mariangela Rondanelli ◽  
Antonella Riva ◽  
Giovanna Petrangolini ◽  
Pietro Allegrini ◽  
Simone Perna ◽  
...  
Keyword(s):  
Systematic Review ◽  
Energy Expenditure ◽  
Metabolic Rate ◽  
Green Tea ◽  
Respiratory Quotient ◽  
Resting Metabolic Rate ◽  
Tea Catechins ◽  
Positive Effects ◽  
Green Tea Catechins ◽  
Acute Intake

The consumption of green tea catechins (GTC) is associated with modulations of fat metabolism and consequent weight loss. The aim of this systematic review was to investigate the effect of GTC on resting metabolic rate (RMR), energy expenditure (EE), and respiratory quotient (RQ). Eligible studies considered both the chronic and acute intake of GTC-based supplements, with epigallocatechin gallate (EGCG) doses ranging between 100–800 mg. Findings from 15 studies (n = 499 participants) lasting 8–12 weeks (for chronic consumption) or 1–3 days (for acute intake) are summarized. This review reveals the positive effects of GTC supplementation on RQ values (272 subjects). Regarding the effects of acute and chronic GTC supplementation on RMR (244 subjects) and EE (255 subjects), the results did not allow for a definitive conclusion, even though they were promising, because some reported a positive improvement (two studies revealed an increase in RMR: one demonstrated an RMR increase of 43.82 kcal/day and another demonstrated an increase of 260.8 kcal/day, mainly when subjects were also engaged in resistance training exercise). Considering GTC daily dose supplementation, studies in which modifications of energetic parameters occurred, in particular RQ reduction, considered GTC low doses (100–300 mg). GTC may be useful for improving metabolic profiles. Further investigations are needed to better define adequate doses of supplementation.

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