Navigation Links
Soy and tomato combo may be effective in preventing prostate cancer
Date:5/8/2013

URBANA Tomatoes and soy foods may be more effective in preventing prostate cancer when they are eaten together than when either is eaten alone, said a University of Illinois study.

"In our study, we used mice that were genetically engineered to develop an aggressive form of prostate cancer. Even so, half the animals that had consumed tomato and soy had no cancerous lesions in the prostate at study's end. All the mice in the control group--no soy, no tomato--developed the disease," said John Erdman, a U of I professor of food science and nutrition.

From the time they were 4 to 18 weeks old, the animals were fed one of four diets: (1) 10 percent whole tomato powder; (2) 2 percent soy germ; (3) tomato powder plus soy germ; and (4) a control group that ate neither tomato nor soy.

The 4- to 18-week time frame modeled an early and lifelong exposure to the bioactive components in these foods, he said.

"Eating tomato, soy, and the combination all significantly reduced prostate cancer incidence. But the combination gave us the best results. Only 45 percent of mice fed both foods developed the disease compared to 61 percent in the tomato group, and 66 percent in the soy group," he said.

Prostate cancer is the most frequently diagnosed cancer in men, but the disease has nearly a 100 percent survival rate if it's caught early. In older men, it is often a slow-growing cancer, and these men often choose watchful waiting over radiation and surgical treatments that have unwelcome side effects, said Krystle Zuniga, co-author of the paper.

Soy isoflavone serum and prostate levels in the mice are similar to those found in Asian men who consume one to two servings of soy daily. In countries where soy is eaten regularly, prostate cancer occurs at significantly lower levels, Erdman noted.

How much soy and tomato should a 55-year-old man concerned about prostate health eat in order to receive these benefits?

"The results of the mouse study suggest that three to four servings of tomato products per week and one to two servings of soy foods daily could protect against prostate cancer," Zuniga said.

According to the scientists, these findings reinforce the recommendation that we should all eat a wide variety of whole fruits and vegetables.

"It's better to eat a whole tomato than to take a lycopene supplement. It's better to drink soy milk than to take soy isoflavones. When you eat whole foods, you expose yourself to the entire array of cancer-fighting, bioactive components in these foods," Erdman said.

The researcher's whole-food recommendation is bolstered by the way soy germ performed in this study. He noted that soy germ has a very different isoflavone profile than the rest of the soybean.

"Of the isoflavones, genistein gets most of the attention. But soy germ is very high in the other isoflavones, daidzein and glycitein, and low in genistein," he said.

It was interesting for the scientists to see that the soy product they used, although low in genistein, was still very effective at reducing cancer incidence.


'/>"/>

Contact: Phyllis Picklesimer
p-pickle@illinois.edu
217-244-2827
University of Illinois College of Agricultural, Consumer and Environmental Sciences
Source:Eurekalert

Related biology news :

1. Organic tomatoes accumulate more vitamin C, sugars than conventionally grown fruit
2. Discovery may lead to new tomato varieties with vintage flavor and quality
3. How sweet it is: Tomato researchers discover link between ripening, color and taste
4. OU scientists and international team deciper the genetic code of the tomato
5. The sequencing of the tomato genome
6. Blossom end rot plummets in Purdue-developed transgenic tomato
7. Combo-snacks of cheese and vegetables cut kids calories
8. Clinical Tests Demonstrate Long-Term Effectiveness of Oral Glutathione Supplements - Kyowa Study
9. A new cost-effective genome assembly process
10. 2 days of staging as effective as 4 for high-altitude climbs
11. A trial to find out the effectiveness of biocides against Vespa velutina
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/12/2016)... , May 12, 2016 WearablesResearch.com ... just published the overview results from the Q1 wave ... the recent wave was consumers, receptivity to a program ... data with a health insurance company. "We ... to share," says Michael LaColla , CEO of ...
(Date:4/28/2016)... India , April 28, 2016 ... Infosys (NYSE: INFY ), and Samsung SDS, a ... that will provide end customers with a more secure, ... services.      (Logo: http://photos.prnewswire.com/prnh/20130122/589162 ) , ... services, but it also plays a fundamental part in enabling ...
(Date:4/26/2016)... , April 27, 2016 ... the  "Global Multi-modal Biometrics Market 2016-2020"  report to ... ) , The analysts forecast the ... CAGR of 15.49% during the period 2016-2020.  ... number of sectors such as the healthcare, BFSI, ...
Breaking Biology News(10 mins):
(Date:5/26/2016)... ISELIN, New Jersey and ... -- Indegene ( http://www.indegene.com ), a ... solutions to life science, pharmaceutical and healthcare organisations ... provider of innovative scientific support throughout the product ... alliance with the launch of IntraScience. ...
(Date:5/26/2016)... ... 26, 2016 , ... FireflySci has been manufacturing quartz and ... over the globe. Their cute firefly logo has been spreading to more and ... spectrophotometer calibration standards that never require recalibration. These revolutionary standards have changed ...
(Date:5/25/2016)... Bethesda, Md. (PRWEB) , ... May 25, 2016 ... ... a request for information (RFI) issued by the Office of the National Coordinator ... the patient experience, and determines if clinically relevant data were available when and ...
(Date:5/24/2016)... ... 2016 , ... Cell therapies for a range of serious ... at Worcester Polytechnic Institute (WPI) that yielded a newly patented method of converting ... novel method, developed by WPI faculty members Raymond Page, PhD, professor of practice ...
Breaking Biology Technology: