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Culinary Shocker: Cooking Can Preserve, Boost Nutrient Content Of Vegetables

Date:
December 30, 2007
Source:
American Chemical Society
Summary:
In a finding that defies conventional culinary wisdom, researchers in Italy report that cooking vegetables can preserve or even boost their nutritional value in comparison to their raw counterparts, depending on the cooking method used.

Contrary to conventional wisdom, a new study by Italian researchers finds that cooking vegetables can preserve or even boost their nutrient content.
Credit: USDA-ARS photo by Scott Bauer

In a finding that defies conventional culinary wisdom, researchers in Italy report that cooking vegetables can preserve or even boost their nutritional value in comparison to their raw counterparts, depending on the cooking method used.

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Their study is scheduled for the Dec. 26 issue of ACS’ Journal of Agricultural and Food Chemistry, a bi-weekly publication.

Nicoletta Pellegrini and colleagues note that although many people maintain that eating raw vegetables is more nutritious than eating cooked ones, a small but growing number of studies suggest that cooking may actually increase the release of some nutrients. However, scientists are seeking more complete data on the nutritional properties of cooked vegetables, the researchers say.

In the new study, the researchers evaluated the effects of three commonly-used Italian cooking practices — boiling, steaming, and frying — on the nutritional content of carrots, zucchini and broccoli. Boiling and steaming maintained the antioxidant compounds of the vegetables, whereas frying caused a significantly higher loss of antioxidants in comparison to the water-based cooking methods, they say. For broccoli, steaming actually increased its content of glucosinolates, a group of plant compounds touted for their cancer-fighting abilities. The findings suggest that it may be possible to select a cooking method for each vegetable that can best preserve or improve its nutritional quality, the researchers say.


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The above story is based on materials provided by American Chemical Society. Note: Materials may be edited for content and length.


Cite This Page:

American Chemical Society. "Culinary Shocker: Cooking Can Preserve, Boost Nutrient Content Of Vegetables." ScienceDaily. ScienceDaily, 30 December 2007. <www.sciencedaily.com/releases/2007/12/071224125524.htm>.
American Chemical Society. (2007, December 30). Culinary Shocker: Cooking Can Preserve, Boost Nutrient Content Of Vegetables. ScienceDaily. Retrieved January 25, 2015 from www.sciencedaily.com/releases/2007/12/071224125524.htm
American Chemical Society. "Culinary Shocker: Cooking Can Preserve, Boost Nutrient Content Of Vegetables." ScienceDaily. www.sciencedaily.com/releases/2007/12/071224125524.htm (accessed January 25, 2015).

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