Tomato lycopene may affect the IGF-system, reduce
cancer risk.
Results of a study published in the November 2007 American Journal
of Clinical Nutrition suggest that supplementing the diet with tomato
lycopene may decrease cancer risk by interfering with the insulin-like
growth factor (IGF) system.
The 8-week, double-blind study, funded by the Dutch Cancer Society,
investigated the effect of supplementation with 30 mg per day of tomato
lycopene on serum concentrations of IGF-I and -II, which are associated
with increased prostate, premenopausal breast, and colorectal cancer
risk, and on their binding proteins (IGFBP-1, -2, and -3). In this
trial, 76 men and women at greater risk of colorectal cancer
participated, using tomato lycopene capsules supplied by LycoRed.
"This is the first study known to show that lycopene
supplementation may increase circulating IGFBP-1 and IGFBP-2
concentrations, thereby potentially decreasing IGF-I
bioavailability," said researcher Alina Vrieling of the Netherlands
Cancer Institute in Amsterdam. "Thus, it may provide a means of
ultimately reducing colorectal cancer risk, and potentially the risks of
other major cancers such as prostate and premenopausal breast
cancer."
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