Green tea may have a therapeutic and positive effect in enhanced gastrointestinal function in food absorption, some scientists suggested.
According to Agriculture and Agri-Food Canada, native catechins found in green tea were not absorbed by the digestive system after intake. The polyphenol accumulated in the intestinal lumen inside the space of a tubular structure where they exhibited significant activity in ameliorated cellular glucose and cholesterol uptake, thus reducing the risk of overexpression of fasting glucose and lipid accumulation entering the bloodstream in the induction of syndromes of abnormally high blood sugar and cholesterol.
The pervaded catechins found at approximately, 2-15% in the intestinal levels significantly bind to 37% to plasma HDL by inhibiting the key enzymes involved in lipid biosynthesis and reducing intestinal lipid absorption, thus improving blood lipid profile action of cholesterol metabolism.
Further analysis of the unstable condition of polyphenols in the intestinal environment, also found that the transition from the gastric phase to the intestinal phase of green tea extract shows a 50% decrease in the antioxidant activity due to the degradation of polyphenols but the deceased extract still exert a strong effect in the gastrointestinal environment.
However, the intake of whole food milk and cheese in the definition of dairy matrices displayed a significant improvement of polyphenol stability in the intestinal phase and an increase of the antioxidant activity by 29% (cheese) to 42% (milk) compared to nongreen tea injection control.
Additionally, administration of green tea also demonstrated strong activity in decreased expression of the stomach secretes pepsinogen, in breaking down milk and cheese protein and fat intake in degraded into their component polypeptide or amino acid and glycerol and fatty acids, respectively in the gastric phase but had no effect on the intestinal phase, thus reducing glucose and fat being absorbed and presented in the bloodstream.
The evidence showed that green tea polyphenols intake together with dairy products improved antioxidant activity and enhanced the integrity of polyphenols during digestion.
Interestingly, in the evaluated rats fed with selenium-containing green tea (Se-GTE, 1.44 mg selenium/kg dry leaves) and China green tea(CH-GTE, 0.13 mg selenium/kg leaves) and China green tea(CH-GTE) effect in the intestinal micro bacterial activity researchers indicated that oral administration of rat group fed with Se-GTE extract for 6 days exerted a significant increase in caecal counts of lactobacilli and bifidobacteria while significantly reducing the caecal counts of Bacteroides and clostridial bacteria in compared to CH-GTE rat group in slight but not significant increase in the numbers of caecal lactobacilli and bifidobacteria but decreased significantly the numbers of Bacteroides (p < 0.05) and clostridia.
Moreover, rats fed with CH-GTE and Se-GTE showed a 17.2% and 21.3% reduction in the activity of the bacterial enzyme β-glucuronidase, which has been found to contribute to biliary sludge and stone formation and increased risk for colorectal cancer, respectively.
More promisingly, treatment of both CH-GTE and Se-GTE also resulted in 19% and 25.5% increments in the activity of β-glucosidase in reduced beta-D-glucosides and oligosaccharides in released glucose, respectively
Taken together, green tea with abundantly major bioactive polyphenols may be considered a functional food in improved gastrointestinal function but reduced absorption of glucose and lipid in the induction of abnormal high fasting blood sugar and cholesterol levels through binding to fat and protein in the gastric phase of digestion.
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Author Biography
Kyle J. Norton (Scholar, Master of Nutrition, All right reserved)
Health article writer and researcher; Over 10.000 articles and research papers have been written and published online, including worldwide health, ezine articles, article base, health blogs, self-growth, best before it's news, the Karate GB Daily, etc.,.
Named TOP 50 MEDICAL ESSAYS FOR ARTISTS & AUTHORS TO READ by Disilgold.com Named 50 of the best health Tweeters Canada - Huffington Post
Nominated for shorty award over last 4 years
Some articles have been used as references in medical research, such as the international journal Pharma and Bioscience, ISSN 0975-6299.
Sources
(1) Interaction of green tea polyphenols with dairy matrices in a simulated gastrointestinal environment by Lamothe S1, Azimy N, Bazinet L, Couillard C, Britten M.(PubMed)
(2) Simulated gastrointestinal digestion, intestinal permeation, and plasma protein interaction of white, green, and black tea polyphenols by Tenore GC1, Campiglia P2, Giannetti D3, Novellino E3.(PubMed)
(3) The ability of green tea to positively modulate key markers of gastrointestinal function in rats by Molan AL1, Liu Z, Tiwari R.(PubMed)
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