Chinese green tea lowers cholesterol level through an increase in fecal lipid excretion

Yang, Teddy; Koo, Marcel W.L.

doi:10.1016/s0024-3205(99)00607-4

Cited by 142 publications

(98 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Catechins have been reported to be potent biomolecules responsible for the health benefits associated with regular drinking of tea [4] [5]. Studies have shown that catechins possess beneficial physiological activities such as antioxidants [6] [7], hypocholesterolemiant [8] [9], anti-atherosclerotic [10], anti-inflammatory [11], and anti-HIV activities [12].…”

Section: Introductionmentioning

confidence: 99%

Influence of Geographical Regions on Catechin and Caffeine Levels in Tea (<i>Camellia sinensis</i>)

Mutuku¹,

Wanyoko²,

Wachira³

et al. 2016

AJPS

View full text Add to dashboard Cite

This study aimed at investigating the influence of different growing conditions in two regions, Timbilil and Kangaita, on the levels of catechins and caffeine. Fresh leaf samples of 60 clones cultivated in both sites were obtained, processed and assayed for levels of caffeine, total and individual catechins using Reverse Phase High Performance Liquid Chromatography (RP-HPLC). The obtained data was subjected to analysis of variance using GENSTAT-C statistical software. Safe for a few clones in the Kangaita site had significantly higher total and individual catechins than those grown in the Timbilil site. A mean epigallocatechin gallate (EGCG) content of 7.9% was observed for Kangaita clones compared to 6.7% in Timbilil. A similar trend was observed for the rest of the individual catechin fractions with a mean epicatechin gallate (ECG) of 3.3% in Kangaita and 2.5% in Timbilil, a mean epigallocatechin (EGC) of 5.2% in Kangaita compared to 5.0% in Timbilil and a mean epicatechin (EC) content of 1.5% in Kangaita compared to 1.4% in Timbilil. Similarly in the total catechins analyses, clones in Kangaita had a mean value of 18.7% compared to 16.2% observed for the Timbilil site clones. However, the Timbilil site clones had significantly high caffeine contents (mean, 4.2%) compared to the Kangaita site clones (mean, 3.9%) although with a few exceptions. Significant interactions (P < 0.05) between clone and region are also observed, suggesting that levels of these biomolecules are bound to differ with the growing region but the extent of variation will vary depending on the clonal genotype. The observed differences in levels of these biologically important biomolecules among the two regions shows the importance of the underlying conditions on the production of tea. * Corresponding author.A. M. Mutuku et al. 563

show abstract

Section: Introductionmentioning

confidence: 99%

Influence of Geographical Regions on Catechin and Caffeine Levels in Tea (<i>Camellia sinensis</i>)

Mutuku¹,

Wanyoko²,

Wachira³

et al. 2016

AJPS

View full text Add to dashboard Cite

show abstract

“…Among them, oolong tea has been studied for its antihypertensive effect (Yang and Koo, 2000), antioxidant properties (Kuroda and Hara, 1999;Siddiqui et al, 2004), effect on reduction of cardiovascular disease risk (Yang and Koo, 1997) and antiobesitic properties (Han et al, 1999;Rumpler et al, 2001;Komatsu et al, 2003). We have previously shown that oolong tea has antihyperglycemic effect .…”

Section: Introductionmentioning

confidence: 99%

Polyphenol-enriched oolong tea increases fecal lipid excretion

Kusumoto

Abe

et al. 2006

Eur J Clin Nutr

View full text Add to dashboard Cite

Objective: To assess possibility of polyphenol-enriched oolong tea to reduce dietary lipid absorption in humans. Design: Twelve healthy adult subjects, three males and nine females, aged (mean7s.d.) 22.071.8 years, respectively, were randomly divided into two groups. The participants were followed a double-blind placebo-controlled crossover design, including 7-day washout periods and 10-day treatment periods. During the treatment periods, subjects were given about 38 g of lipids from potato chips (19 g each within 30 min after lunch and dinner) and total 750 ml beverages (placebo-or polyphenolenriched oolong tea) at three meals. Blood samples were collected for biochemical examination at days 8, 18, 25 and 35 of the study period. On the last 3 days of each treatment period, feces were collected to measure the excretion of lipids. Results: Lipid excretion into feces was significantly higher in the polyphenol-enriched oolong tea period (19.3712.9 g/3day) than in the placebo period (9.477.3 g/3day) (Po0.01). Cholesterol excretion tended to increase in polyphenol-enriched oolong tea period (1.871.2 g/3day) compared with that of placebo (1.270.6 g/3day) (P ¼ 0.056). Conclusions:The results of this study indicated that polyphenol-enriched oolong tea could increase lipid excretion into feces when subjects took high-lipid diet.

show abstract

“…Since catechins have been considered as the major effective component of green tea, many beneficial effects of green tea are attributed to them. They are powerful antioxidants, which are thought to be at least in part responsible for green tea's hepatoprotective activity (Miyagawa et al, 1997, Yand andKoo, 2000). But this effect of green tea is not dependent on its direct antioxidation effects alone.…”

Section: Discussionmentioning

confidence: 99%

“…Other potential mechanisms may be involved including: the promotion of cholesterol and bile acid excretion (Yang & Koo., 2000) or the inhibition of cholesterol and bile acid absorption (Chan et al, 1999).…”

Section: Removal Of the Bad Effects Of D-galactosamine On Blood Lipidmentioning

confidence: 99%

Removal of the Bad Effects of D-Galactosamine on Blood Lipids of Male Wistar Rats By Black and Green Tea Consumption

Al‐Seeni¹,

Banjabi²,

Mohamed³

2017

IOSRJPBS

View full text Add to dashboard Cite

Chinese green tea lowers cholesterol level through an increase in fecal lipid excretion

Cited by 142 publications

References 21 publications

Influence of Geographical Regions on Catechin and Caffeine Levels in Tea (<i>Camellia sinensis</i>)

Influence of Geographical Regions on Catechin and Caffeine Levels in Tea (<i>Camellia sinensis</i>)

Polyphenol-enriched oolong tea increases fecal lipid excretion

Removal of the Bad Effects of D-Galactosamine on Blood Lipids of Male Wistar Rats By Black and Green Tea Consumption

Contact Info

Product

Resources

About

Chinese green tea lowers cholesterol level through an increase in fecal lipid excretion

Cited by 142 publications

References 21 publications

Influence of Geographical Regions on Catechin and Caffeine Levels in Tea (&lt;i&gt;Camellia sinensis&lt;/i&gt;)

Influence of Geographical Regions on Catechin and Caffeine Levels in Tea (&lt;i&gt;Camellia sinensis&lt;/i&gt;)

Polyphenol-enriched oolong tea increases fecal lipid excretion

Removal of the Bad Effects of D-Galactosamine on Blood Lipids of Male Wistar Rats By Black and Green Tea Consumption

Contact Info

Product

Resources

About

Influence of Geographical Regions on Catechin and Caffeine Levels in Tea (<i>Camellia sinensis</i>)

Influence of Geographical Regions on Catechin and Caffeine Levels in Tea (<i>Camellia sinensis</i>)