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green tea and weight loss

Alicia Garcia-Alvarez, Raimon Mila-Villarroel, Lourdes Ribas-Barba, Bernadette Egan, Mihaela Badea, Franco M Maggi, Maija Salmenhaara, Patrizia Restani, Lluis Serra-Majem
BACKGROUND: Obesity is increasing worldwide and weight-control strategies, including the consumption of plant food supplements (PFS), are proliferating. This article identifies the herbal ingredients in PFS consumed for weight control and by overweight/obese dieters in six European countries, and explores the relationship between their consumption and their self-reported BMI. METHODS: Data used were a subset from the PlantLIBRA PFS Consumer Survey 2011-2012, a retrospective survey of 2359 PFS consumers...
2016: BMC Complementary and Alternative Medicine
Luisa Gilardini, Lucia Pasqualinotto, Francesco Di Pierro, Paolo Risso, Cecilia Invitti
BACKGROUND: Most subjects regain weight after weight loss due to compensatory adaptations finalized to maintain stable body energy stores. Green tea (GT) preparations, which help maintain energy expenditure while dieting could be a useful strategy to facilitate weight maintenance. The usefulness of GT preparations in weight maintenance has been poorly studied so far with conflicting results. This study evaluated if a supplement of GSP and piperine helps obese women to maintain the weight loss obtained with a 3-month lifestyle intervention...
2016: BMC Complementary and Alternative Medicine
Nawal A Ahmed, Nasr M Radwan, Heba S Aboul Ezz, Noha A Salama
Electromagnetic radiation (EMR) of cellular phones may affect biological systems by increasing free radicals and changing the antioxidant defense systems of tissues, eventually leading to oxidative stress. Green tea has recently attracted significant attention due to its health benefits in a variety of disorders, ranging from cancer to weight loss. Thus, the aim of the present study was to investigate the effect of EMR (frequency 900 MHz modulated at 217 Hz, power density 0.02 mW/cm(2), SAR 1.245 W/kg) on different oxidative stress parameters in the hippocampus and striatum of adult rats...
July 11, 2016: Electromagnetic Biology and Medicine
Elizabeth X Zheng, Simona Rossi, Robert J Fontana, Raj Vuppalanchi, Jay H Hoofnagle, Ikhlas Khan, Victor J Navarro
INTRODUCTION: Herbal and dietary supplements (HDS) have been increasingly recognized as a cause for acute liver injury (Navarro et al. Hepatology 60(4):1399-1408, 2014; Bailey et al. J Nutr 141:261-266, 2011). HDS products frequently contain numerous ingredients, and are marketed under various product names. A perusal of marketed weight loss products indicates that green tea extract (GTE) is a common ingredient in many. We aimed to describe the course and outcome of six patients who developed liver injury attributed to SLIMQUICK(®) weight loss products...
August 2016: Drug Safety: An International Journal of Medical Toxicology and Drug Experience
A Puri, H X Nguyen, A K Banga
OBJECTIVE: Epigallocatechin-3-gallate (EGCG) is the physiologically most active and abundant flavanol, accounting for 50-80% of green tea catechins. It is an anti-inflammatory, antioxidant, chemopreventive and skin photoprotective agent. However, light sensitivity and low permeability of EGCG across the stratum corneum due to its high molecular weight as well as strong binding to the lipid bilayers in the skin make it difficult to be used as a key ingredient in cosmetic products. This study aimed to formulate a photostable hydrogel of EGCG with good rheological properties for dermal application and investigate the effect of skin microporation using maltose microneedles on its permeation through dermatomed porcine skin...
October 2016: International Journal of Cosmetic Science
Sumit Jamwal, Puneet Kumar
L-theanine is unique amino acid which readily crosses blood brain barrier and possesses neuroprotective potential against neurodegenerative disorders including Huntington disease (HD). HD is characterized by selective loss of GABAergic medium spiny neurons. 3-nitropropionic acid (3-NP) induces a spectrum of HD-like neuropathology in rat striatum and widely used as experimental tool to study HD. Therefore, the present study was intended to investigate the effect of L-theanine against 3-NP-induced striatal toxicity and to explore its possible mechanism...
March 9, 2016: Molecular Neurobiology
Pilou L H R Janssens, Rick Hursel, Margriet S Westerterp-Plantenga
Green tea catechins mixed with caffeine have been proposed as adjuvants for maintaining or enhancing energy expenditure and for increasing fat oxidation, in the context of prevention and treatment of obesity. These catechins-caffeine mixtures seem to counteract the decrease in metabolic rate that occurs during weight loss. Their effects are of particular importance during weight maintenance after weight loss. Other metabolic targets may be fat absorption and the gut microbiota composition, but these effects still need further investigation in combination with weight loss...
August 1, 2016: Physiology & Behavior
Dongxu Wang, Yaqing Wei, Taotao Wang, Xiaochun Wan, Chung S Yang, Russel J Reiter, Jinsong Zhang
(-)-Epigallocatehin-3-gallate (EGCG), a major constituent of green tea, can ameliorate metabolic syndrome at least in part through reducing gluconeogenesis and lipogenesis. Green tea extracts, of which EGCG is a key constituent, have been used for weight loss in humans. A potential adverse effect of high-dose EGCG or green tea extracts is hepatotoxicity. Melatonin, an endogenous antioxidant with a high safety profile, is effective in preventing various types of tissue damage. The current study investigated the influence of melatonin on EGCG-triggered hepatotoxicity and EGCG-downregulated hepatic genes responsible for gluconeogenesis and lipogenesis in mice...
November 2015: Journal of Pineal Research
Mahmoud Bahmani, Zohreh Eftekhari, Kourosh Saki, Ezatollah Fazeli-Moghadam, Mahyar Jelodari, Mahmoud Rafieian-Kopaei
Obesity is an important disorders due to which 25 million deaths occur annually worldwide. Synthetic drugs for weight loss have low efficacy and high side effects. Apart from synthetic drugs in modern medicine, various other methods including the use of herbal medications are used to induce weight loss. Cambodia hoodia, green tea, Citrus aurantium, white beans, fenugreek, caffeine, ephedrine, capsaicin, yohimbine, chitosan, fitostreols, and guar gum have been studied in clinical trials and their effects have been confirmed...
July 2016: Journal of Evidence-based Complementary & Alternative Medicine
Roxanne M Vogel, Jordan M Joy, Paul H Falcone, Matt M Mosman, Michael P Kim, Jordan R Moon
BACKGROUND: Thermogenic (TRM) supplements are often used by people seeking to decrease body weight. Many TRM supplements are formulated with multiple ingredients purported to increase energy expenditure and maximize fat loss. However, in the past some TRM ingredients have been deemed unsafe and removed from the market. Therefore, it is important to verify the safety of multi-ingredient TRM supplements with chronic consumption. OBJECTIVE: To assess the safety of daily consumption of a multi-ingredient TRM supplement over a 28-day period in healthy adults...
2015: Food & Nutrition Research
Hiroshi Shimoda, Shoketsu Hitoe, Seikou Nakamura, Hisashi Matsuda
A number of clinical trials have been completed using green tea and black tea to investigate their effect in controlling weight in overweight adults. The results of these investigations, however, have often been contradictory, with some trials reporting positive effects of tea supplementation and some trials reporting no effect. As a result, the use of these teas for weight loss is controversial. Purple tea is a variety of green tea developed in Kenya (called TRFK306), which in addition to certain tea constituents found in green tea, also contains anthocyanins...
June 2015: International Journal of Biomedical Science: IJBS
Maureen Whitsett, Dina Halegoua-De Marzio, Simona Rossi
Green tea extract is a popular ingredient in herbal weight loss supplements. There have been reports of hepatotoxicity associated with the use of dietary supplements, some of these cases lead to fatal outcomes. To our knowledge, we report the first case of fulminant hepatic failure requiring orthotopic liver transplantation caused by SlimQuick™ (Wellnx Life Sciences, Wilmington, DE), a widely available weight loss supplement containing green tea extract.
July 2014: ACG Case Reports Journal
I-Ju Chen, Chia-Yu Liu, Jung-Peng Chiu, Chung-Hua Hsu
BACKGROUND AND AIMS: To examine the effect and safety of high-dose green tea extract (Epigallocatechin gallate, EGCG) at a daily dosage of 856.8 mg on weight reduction and changes of lipid profile and obesity-related hormone peptides in women with central obesity. METHODS: We conducted a randomized, double-blind trial registered under Identifier no. NCT02147041. A total of 115 women with central obesity were screened at our clinic. 102 of them with a body mass index (BMI) ≥ 27 kg/m(2) and a waist circumference (WC) ≥ 80 cm were eligible for the study...
June 2016: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
Duygu Turközu, Nilufer Acar Tek
In recent years, individuals have begun to tend more frequently to some natural and herbal products to be used alone or as a combination with diet and exercise for ensuring the weight loss. Green tea is the leading one of these products. In some studies, it is reported that the green tea causes an increase in thermogenesis and substrate with fat oxidation by affecting on the sympathetic nervous system. It is reported that green tea has two main components that are associated with energy expenditure. One of them is caffeine and the other is catechin content...
June 19, 2015: Critical Reviews in Food Science and Nutrition
Gabriela Mazzanti, Antonella Di Sotto, Annabella Vitalone
Green tea (GT), obtained from the leaves of Camellia sinensis (L.) Kuntze (Fam. Theaceae), is largely used for its potential health benefits such as reduction in risk of cardiovascular diseases and weight loss. Nevertheless, it is suspected to induce liver damage. Present work reviews the hepatic adverse reactions associated with GT-based herbal supplements, published by the end of 2008 to March 2015. A systematic research was carried out on PubMed, MedlinePlus, Scopus and Google Scholar databases, without any language restriction...
August 2015: Archives of Toxicology
Abdel-Majeed Safer, Mohamad Afzal, Nomny Hanafy, Shaker Mousa
The aim of the present study was to investigate the hepatoprotective effect of green tea extract (GTE) against the hepatic fibrosis induced by carbon tetrachloride (CCl4), ethanol, and dual exposure to CCl4 plus ethanol in rats. In particular, an investigation of the three-dimensional architecture was conducted using scanning electron microscopy. Various techniques revealed that hepatic fibrosis with intermingled fibers was located between cells in the CCl4, ethanol and combined CCl4 plus ethanol groups. The hepatic fibrosis differed among the ethanol, CCl4 and CCl4 plus ethanol groups in terms of the type, thickness and distribution of fibers...
March 2015: Experimental and Therapeutic Medicine
André Vitorio Câmara de Oliveira, Frederico Theobaldo Ramos Rocha, Sílvio Romero de Oliveira Abreu
INTRODUCTION: Not responsible self-medication refers to drug use in high doses without rational indication and often associated with alcohol abuse. It can lead to liver damage and drug interactions, and may cause liver failure. AIM: To warn about how the practice of self-medication can be responsible for acute liver failure. METHOD: Were used the Medline via PubMed, Cochrane Library, SciELO and Lilacs, and additional information on institutional sites of interest crossing the headings acute liver failure [tiab] AND acetaminophen [tiab]; self-medication [tiab] AND acetaminophen [tiab]; acute liver failure [tiab] AND dietary supplements [tiab]; self-medication [tiab] AND liver failure [tiab] and self-medication [tiab] AND green tea [tiab]...
November 2014: Arquivos Brasileiros de Cirurgia Digestiva: ABCD, Brazilian Archives of Digestive Surgery
Yanqiu Wang, Bowen Wang, Feng Du, Xuesong Su, Guangping Sun, Guangyu Zhou, Xiaohui Bian, Na Liu
Oxidative stress and inflammation contribute importantly to the pathogenesis of chronic kidney disease (CKD). Epigallocatechin-3-gallate (EGCG), which is the most abundant and most active catechin polyphenol extracted from green tea, has been proved to have many bioactivities. In this study, the renoprotective effect of EGCG was evaluated in a widely used kidney disease model, the unilateral ureteral obstruction (UUO) mice model. After 14 days of EGCG administration, mean arterial blood pressure, body-weight and obstructed kidney weight were measured...
September 2015: Basic & Clinical Pharmacology & Toxicology
Julieta Fernández, Carmen Navascués, Gino Albines, Lissa Franco, María Pipa, Manuel Rodríguez
Liver toxicity associated with herbal remedies and dietary supplements is an increasing concern. Several toxic hepatitis cases have been reported in the literature in association with products intended for weight loss where green tea extracts are an ingredient.Three hepatotoxicity cases are reported below in association with the use of Inneov masa capilar®, a dietary supplement intended to stop hair loss whose primary component is green tea catechins. In all of them, other potential causes of acute hepatitis were ruled out...
December 2014: Revista Española de Enfermedades Digestivas
S T Ahmed, J-W Lee, H-S Mun, C-J Yang
Forty-eight castrated male goats were used to determine the effects of feeding green tea by-products (GTB) on growth performance, meat quality, blood metabolites and immune cell proliferation. Experimental treatments consisted of basal diets supplemented with four levels of GTB (0%, 0.5%, 1.0% or 2.0%). Four replicate pens were assigned to each treatment with three goats per replicate. Increasing dietary GTB tended to linearly increase the overall average weight gain and feed intake (p = 0.09). Water holding capacity, pH and sensory attributes of meat were not affected by GTB supplementation, while cooking loss was reduced both linearly and quadratically (p < 0...
December 2015: Journal of Animal Physiology and Animal Nutrition
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