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Why Organic Tomatoes Are Better for You

Researchers probe antioxidant-enhanced tomatoes

By Nick McMaster,  Newser Staff

Posted May 31, 2008 6:34 AM CDT

(Newser) – Some organically grown tomatoes appear to have higher levels of potent antioxidants, and the reason may be in the fertilizer, NPR reports. Researchers at UC Davis running tests on levels of the antioxidants, known as flavonoids, found 79%-97% higher flavonoid levels in the organic tomatoes.

One explanation now being tested is that the nonorganic growing process involves commercial fertilizer with added soluble nitrogen, which plants absorb quickly for maximum growth. The organic process uses manure and compost for fertilizing; both deliver nitrogen more slowly. The plants may use that extra time “toward making secondary plant metabolites”—like flavonoids, speculates one researcher.

Organically grown tomatoes hang from a vine at the organic garden on the edge of the Yale University campus in New Haven, Conn., Wednesday, Oct. 24, 2007.
Organically grown tomatoes hang from a vine at the organic garden on the edge of the Yale University campus in New Haven, Conn., Wednesday, Oct. 24, 2007.   (AP Photo/Bob Child)
Organic tomatoes are inspected at a food farm in Wales.
Organic tomatoes are inspected at a food farm in Wales.   (Magnum Photos)
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