There might be working to which Isofrabon such as soybeans suppresses the breast cancer. The Ministry of Health, Labour and Welfare research group announced.

Isofrabon was assumed to be included in the soybean etc. a lot, and for the protective efficacies such as the breast cancer and osteoporosis to exist and a positive intake had been stated for about two years ago. However, Food Safety Commission is pointed out the influence on the reproductive function etc. at the same time, and has decided the upper bound value when adding to meal in daily life as Tocho and taking it up to 30 day milligrams (The intake standard amount upper bound value of a safe day of soybean Isofrabon is 75 milligrams from 70). In addition, it is assumed, "The intake as Tocho cannot be recommended" about the pregnant woman and the child of less than 15 years.

The density of Isofrabon (Genistan and Daizan) was measured with 144 people who had gotten breast cancers by using the preserved blood of 432 people in total that chose two people that the condition resembled each the person at random in the research consortium from among the investigation data of about 25,000 women of 40-69 years who had pursued it until 2002.

As a result, high density groups came out the result that the breast cancer risk had stayed in about 1/3 most in the relation to Genistan compared with the group of the low concentration though neither the density of Daizan nor the relation to the breast cancer were seen.

The Genistan density and the breast cancer risk of Isofrabon in blood.

A high density group of Isofrabon in the investigation corresponds to 46.5 milligrams when converting it into the intake during a day now. This corresponds to 20 grams and corresponds to one packing about 60 grams by 100-150 grams (half even number) in case of natto in case of soybean flour in case of the bean curd.

Because Isofrabon is called, "Plant estrogen", is similar to the female hormone the structure, and unites with the estrogen receptor, it is thought by the breast cancer that it works preventing it. As for Genistan, the uniting power is especially thought for the effect to have become visible clearly because the effect can be strongly expected for a long term.

In the research consortium｢It is not easy to think about the risk rise of the breast cancer from meal in case of the vaccinated range though there is a theory of raising the risk of the breast cancer when Isofrabon is vaccinated, too. The possibility of lowering was suggested in case of being the proper quantity. ｣It is described that it wants to do with future tasks whether it shows, it relates to the amount and the time of the intake, and more very the influence of supplement.