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Enova, a popular cooking oil in Japan, is being test-marketed in the U.S. It claims to be specially processed so that it "can actually help you maintain, not gain weight."
Is that claim true? Published research supported by the food industry appears to back up the no-weight-gain claims; one small, six-month clinical trial, funded by Enova's manufacturer, noted modest weight loss. But so far, the evidence is scanty.
Enova, a blend of soy and canola oils, contains essentially the same amount of calories and fat as other vegetable oils. In processing, an enzyme is introduced that arranges the fatty acids so that 80 percent of Enova's fat molecules contain just two fatty acids; those fat molecules are called diacylglycerols.
Some evidence suggests that the liver may burn diacylglycerols, which may result in suppressed appetite.
"We really don't understand how this would work," says Robert H. Eckel, M.D., a professor at the University of Colorado and ...