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Nutrition / Diet News

Soybeans No Longer A Musical Fruit? Victory Over Soy's 'flatulence Factor' - Journal Of Agricultural And Food Chemistry

Main Category: Nutrition / Diet
Also Included In: GastroIntestinal / Gastroenterology
Article Date: 23 Oct 2008 - 4:00 PDT

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Soybeans may drop off the list of musical fruit. Scientists in Singapore are reporting victory over some consumers' No. 1 complaint about soy products - the "flatulence factor" caused by indigestible sugars found in soy. In a study scheduled for the November 12 issue of ACS' bi-weekly Journal of Agricultural and Food Chemistry, they describe a method for significantly reducing the amount of flatulence-causing carbohydrates in soy yogurt while raising the levels of healthy antioxidants known as isoflavones.

In the study, Dejian Huang and colleagues note that soy yogurt has a global market share of only 1.9 percent, even though it has a number of health advantages over dairy-based yogurt. That's partly because of the flatulence-causing compounds in soy. "It would be desirable to remove the flatulence-causing raffinose and stachyose from the soy yogurt to improve consumers' preferences. The objective of this study was to develop a new soy yogurt enriched with isoflavones with reduced levels of flatulence-causing oligosaccharides," the scientists said.

The researchers grew soybeans in the presence of a fungus that produced enzymes capable of degrading the undesired sugars. "We have demonstrated for the first time that germinated black soybeans under fungal stress can be fermented into a soy yogurt which features a low amount of flatulence-causing oligosaccharides but with a significant level of isoflavones," says Huang.

Article
"Novel Process of Fermenting Black Soybean [Glycine max (L.) Merrill] Yogurt with Dramatically Reduced Flatulence-Causing Oligosaccharides but Enriched Soy Phytoalexins"
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Journal of Agricultural and Food Chemistry

Source
Michael Bernstein
American Chemical Society
1155 Sixteenth Street, N.W. Washington, D.C. 20036
http://www.acs.org




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