Navigation Links
Model backs green tea and lemon claim, lessens need to test animals
Date:9/9/2009

WEST LAFAYETTE, Ind. - An animal study at Purdue University has shown that adding ascorbic acid and sugar to green tea can help the body absorb helpful compounds and also demonstrates the effectiveness of a model that could reduce the number of animals needed for these types of studies.

Mario Ferruzzi, associate professor of food science and nutrition, adapted a digestion model with human intestinal cells to show that adding ascorbic acid to green tea would increase the absorbability of catechins found in the tea. Catechins, a class of polyphenols common in tea, cocoa and grape, are antioxidants thought to fight heart disease, stroke, cancer, diabetes and other health problems.

Ferruzzi, Elsa Janle, a Purdue associate research professor of foods and nutrition, and Catrina Peters, a Purdue graduate student in nutrition, were able to demonstrate that adding ascorbic acid, sucrose or both together increases by as much as three times the amount of catechins that can be absorbed into the bloodstream. The results of the in vivo study compared well with those predicted by the in vitro model.

"This model may be used as a pre-emptive screening tool at very little cost before you do expensive tests on animals or humans," said Ferruzzi, whose findings were published in the early online edition of the journal Food Research International. "If you want to get human screening off the ground, it takes months. If you want to use this model, it takes hours."

The model charts how the digestive stability, solubility and absorption of polyphenols changes based on modifications to a beverage's formula. It will not be exact in terms of measurements, but when compared to the in vivo test in rats, the model's predictions matched directionally to the in vivo study and were relatively close proportionately.

Ferruzzi said testing with the model could allow researchers to predict how a new product formula might change the product's properties, reducing the number of animals needed for testing to only products that showed desired characteristics in the model. The model also can be adapted to simulate the digestive characteristics of other animals or humans as originally intended.

"As long as we know the typical gastrointestinal conditions of an animal and the volumes, we can adapt the model to mimic those conditions," Ferruzzi said. "You don't have to do expensive precursor studies."

The in vivo study backed up the model study that showed adding sugar and vitamin C to green tea enhanced the body's ability to absorb polyphenols. Ferruzzi said that adding lemon juice or other citrus juice to tea would do the trick, or consumers could look for ready-to-drink products that contain 100 percent of the recommended amount of vitamin C or ascorbic acid on the ingredient list.

"Having that vitamin C seems to do it," Ferruzzi said. "And if you don't want to squeeze a lemon into your cup, just have a glass of juice with your green tea."

Connie Weaver, head of the National Institutes of Health Purdue University-University of Alabama at Birmingham Botanical Research Center for Age-Related Diseases, which funded the research, said the study's focus was an important part of understanding how to get the most out of compounds considered beneficial.

"There is a lot of interest in bioactive materials to protect people from disease and promote better health," Weaver said. "What's been totally ignored is the way these materials are found in foods in combination with other ingredients. How they're involved in the food matrix can affect how you absorb these health promoters."

Ferruzzi said the next step in the research is to stage a human clinical trial.


'/>"/>

Contact: Brian Wallheimer
bwallhei@purdue.edu
765-496-2050
Purdue University
Source:Eurekalert  

Related biology news :

1. Novel 3-D cell culture model shows selective tumor uptake of nanoparticles
2. A new kind of rat model
3. JILA finds flaw in model describing DNA elasticity
4. Smithsonian researchers develop models to assess wetland health
5. Prediction of RNA pseudoknots using heuristic modeling with mapping and sequential folding
6. Simulating kernel production influences maize model accuracy
7. MIT model could improve some drugs effectiveness
8. Model for the assembly of advanced, single-molecule-based electronic components developed at Pitt
9. Improving detection of nuclear smuggling goal of computer model of mechanical engineer
10. New chimeric mouse model for human liver diseases, drug testing
11. Study finds first-ever genetic animal model of autism
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Model backs green tea and lemon claim, lessens need to test animals
(Date:3/7/2017)... 7, 2017   HireVue , the leading provider ... identify the best talent, faster, today announced the additions ... (CSO) and Diana Kucer as Chief Marketing ... executive team poised to drive continued growth in the ... year of record bookings in 2017. "Companies ...
(Date:3/2/2017)... , March 2, 2017 Who risk ... lawsuits? Download the full report: https://www.reportbuyer.com/product/4313699/ ... THE FINGERPRINT SENSOR FIELD? Fingerprint sensors using capacitive ... The fingerprint sensor vendor Idex forecasts an increase of ... mobile devices and of the fingerprint sensor market between ...
(Date:2/28/2017)... February 28, 2017 News solutions for biometrics, ... ... from 14 to 16 March, Materna will present its ... how seamless travel is a real benefit for passengers. To ... to their passenger touch point solutions to take passengers through the ...
Breaking Biology News(10 mins):
(Date:3/29/2017)... , March 29, 2017 /PRNewswire/ - Last year,s petition to ... not the only efforts active to generate awareness on the importance ... pharmaceutical drugs in the healthcare market place. ... Earlier this month Health Advance ... distributor of pharmaceutical and nutritional products, announced its endeavors on this ...
(Date:3/29/2017)... (PRWEB) , ... March 29, 2017 , ... ComplianceOnline, the ... subjects has announced its 3rd Annual Medical Device Summit 2017 venue and speaker lineup. ... Parker House Hotel, in Boston, MA. , The Omni Parker House Hotel, which is ...
(Date:3/29/2017)... ... March 29, 2017 , ... ACEA Biosciences, ... disperses a quarterly travel award to noteworthy scientists who will be presenting research ... its new round of awards are being given to two postdoctoral fellows studying ...
(Date:3/29/2017)... NEWARK, Del. , March 29, 2017 ... medicine company, and W. L. Gore & ... announced a collaborative research agreement whereby the two companies ... delivery device technologies that provide protection from immune rejection. ... has been developing innovative stem cell-derived cell replacement therapies ...
Breaking Biology Technology: