Effectiveness of moderate green tea consumption on antioxidative status and plasma lipid profile in humans

Erba, Daniela; Riso, Patrizia; Bordoni, Alessandra; Foti, Paola; Biagi, Pierluigi; Testolin, G.

doi:10.1016/j.jnutbio.2004.11.006

Cited by 187 publications

(127 citation statements)

References 44 publications

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“…We did not find any effect of green tea-extracted powder supplementation on serum lipids, which was consistent with the results of previous trials (Princen et al, 1998;Erba et al, 2005).…”

Section: Discussionsupporting

confidence: 92%

Randomized controlled trial for an effect of green tea-extract powder supplementation on glucose abnormalities

et al. 2007

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Objective: We examined whether green tea-extract powder supplementation improves glucose abnormality. Methods: The study was conducted for volunteers who resided in eastern communities of Shizuoka Prefecture and who had fasting blood glucose levels of X6.1 mmol/l or nonfasting blood glucose levels of X7.8 mmol/l in a recent health check-up. Sixty subjects aged 32-73 years (49 males and 11 females) participated in the trial. The Early intervention group consumed a packet of green tea-extract powder containing 544 mg polyphenols (456 mg catechins) daily for the first 2 months and then entered the 2-month nonintervention period. The Later intervention group was observed for the first 2 months and then consumed green tea-extract powder as described above for the subsequent 2 months. Using the two-period crossover design, we analyzed the changes in fasting hemoglobin A1c level and other biomarkers in blood samples collected at baseline, 2 months and 4 months. Results: A significant reduction in hemoglobin A1c level and a borderline significant reduction in diastolic blood pressure were associated with the intervention. The intervention caused no significant changes in weight, body mass index, body fat, systolic blood pressure, fasting serum glucose level, homeostasis model assessment index, serum lipid level or hypersensitive C-reactive protein.Conclusion: Daily supplementary intake of green tea-extract powder lowered the hemoglobin A1c level in individuals with borderline diabetes.

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“…We did not find any effect of green tea-extracted powder supplementation on serum lipids, which was consistent with the results of previous trials (Princen et al, 1998;Erba et al, 2005).…”

Section: Discussionsupporting

confidence: 92%

Randomized controlled trial for an effect of green tea-extract powder supplementation on glucose abnormalities

et al. 2007

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“…The positive associations found between the total antioxidant capacity of plasma (FRAP value) and the intakes of fish, red meat and poultry, was probably as a consequence of an increase in plasma uric acid resulting from fish and meat intake. The positive associations found between wine and tea intakes and FRAP value have also been found in other studies (Cao et al, 1998;Benzie et al, 1999;Erba et al, 2005), and this relationship could arise from the presence of several polyphenolic compounds present in these beverages. Finally, it is worth noting that habitual intakes of none of the fruit and vegetables subgroups had any associations with FRAP value, perhaps indicating some limitations to the use of FRAP assay as a measure of total antioxidant status in humans in vivo.…”

Section: Discussionsupporting

confidence: 84%

Influence of habitual diet on antioxidant status: a study in a population of vegetarians and omnivores

et al. 2007

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Background: Antioxidant status can be used as a biomarker to assess chronic disease risk and diet can modulate antioxidant defence. Objective: To examine effects of vegetarian diet and variations in the habitual intakes of foods and nutrients on blood antioxidants. Subjects and Setting: Thirty-one vegetarians (including six vegans) and 58 omnivores, non-smokers, in Northern Ireland. Design: A diet history method was used to assess habitual diet. Antioxidant vitamins, carotenoids, uric acid, zinc-and ferricreducing ability of plasma (FRAP) were measured in fasting plasma and activities of glutathione peroxidase (GPX), superoxide dismutase (SOD) and glutathione S-transferase (GST) and level of reduced glutathione (GSH) were measured in erythrocytes. Results: Vegetarians had approximately 15% higher levels of plasma carotenoids compared with omnivores, including lutein (Pp0.05), a-cryptoxanthin Pp0.05), lycopene (NS), a-carotene (NS) and b-carotene (NS). The levels/activities of all other antioxidants measured were similar between vegetarians and omnivores. Total intake of fruits, vegetables and fruit juices was positively associated with plasma levels of several carotenoids and vitamin C. Intake of vegetables was positively associated with plasma lutein, a-cryptoxanthin, a-carotene and b-carotene, whereas intake of fruits was positively associated with plasma b-cryptoxanthin. Intake of tea and wine was positively associated with FRAP value, whereas intake of herbal tea associated positively with plasma vitamin C. Intakes of meat and fish were positively associated with plasma uric acid and FRAP value. Conclusions: The overall antioxidant status was similar between vegetarians and omnivores. Good correlations were found between intakes of carotenoids and their respective status in blood.

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“…Tea contains many known antioxidants and is one of the most popular beverages worldwide. Recently, green tea consumed within a balanced diet has been reported to improve the overall antioxidant status and protect humans from oxidative damage (Erba et al, 2005). Tea preparations have been shown to trap ROS, such as superoxide radicals, singlet oxygen, hydroxyl radicals, peroxyl radicals, nitric oxide, nitrogen dioxide, and peroxynitrite, thereby reducing their damage to lipids, proteins, and nucleic acids in cellfree systems (Khan and Mukhtar, 2007).…”

Section: Discussionmentioning

confidence: 99%

“…Recently, green tea consumed in a balanced and controlled diet was reported to improve the overall anti-oxidative status and protect humans against oxidative damage (Erba et al, 2005). In our previous study, we investigated epicatechin (EC), a minor component of green tea, to determine whether it could be used to prevent cisplatin-induced ototoxicity caused by ROS generation, by preventing changes in the mitochondrial membrane potential (Kim et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Epicatechin protects the auditory organ by attenuating cisplatin-induced ototoxicity through inhibition of ERK

et al. 2010

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Effectiveness of moderate green tea consumption on antioxidative status and plasma lipid profile in humans

Cited by 187 publications

References 44 publications

Randomized controlled trial for an effect of green tea-extract powder supplementation on glucose abnormalities

Randomized controlled trial for an effect of green tea-extract powder supplementation on glucose abnormalities

Influence of habitual diet on antioxidant status: a study in a population of vegetarians and omnivores

Epicatechin protects the auditory organ by attenuating cisplatin-induced ototoxicity through inhibition of ERK

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