Soy Plus Tomato May Help Prevent Prostate Cancer
Eating tomatoes and soy products together was found to be more effective in preventing prostate cancer than eating each one alone, says a University of Illinois professor, John Erdman.
Erdman and his group conducted a study using genetically engineered mice which were divided into four groups with different diets: (1) fed with 10% whole tomato powder; (2) with 2% soy germ; (3) with tomato powder and soy germ; (4) control, no tomato no soy germ; starting from the time the animals were 4 to 18 weeks old.
Erdman found out that all mice in the control group developed the disease while half of the animals that had eaten soy and tomatoes did not develop cancerous lesions. Only 45% of mice fed with both foods developed cancer compared to 61% in the tomato group, and 66% in the soy group.
Prostate cancer is the leading diagnosed cancer in men although it has 100% survival rate when diagnosed at an early stage. It is a slow-growing cancer in older men who often opt to wait and see rather than have radiation and surgery as treatment.
The researchers recommend eating a whole tomato than taking lycopene supplement, and drinking soymilk than taking soy isoflavones, since it was found out that soy germ has a different isoflavone profile. These recommendations were concluded based on the performance of soy germ in the study.
The scientists believe that these findings reinforce the nutritional guidelines, which recommend eating a wide variety of whole fruits and vegetables.
University of Illinois College of Agricultural, Consumer and Environmental Sciences. Soy and tomato may be effective in preventing prostate cancer. ScienceDaily.