In the fourth decade of the twentieth century, farmers in Australia have found that sheep that feeding a particular type of clover not be reproduced normally. After analyzing their urine were found to be rediscovered a substance called equol, similar to a female hormone, estrogen. Bacteria in the intestine of the sheep turned some phytonutrients contained in clover in equol. A Japanese study conducted by The National Cancer Center in Tokyo has found that women who eat soy foods on a regular basis are less exposed to illness of breast cancer, with a much lower risk than other women. The study was conducted on a sample of 25,000 women aged between 40 and 69 years in Japan, for a period of 10 years. Japanese research team studied the link between concentration of genistein in female body and frequency of malignant breast tumors. Thus it was concluded that the risk of contracting breast cancer in women with higher levels of genistein is three times lower than in women with low levels of this compound in the body.



Women who consume soy in the body have a high level of genistein, a compound that enters into the composition of soy, are less exposed to risk of  disease. Until recently it was considered only soy food poverty-related, but its optical changed lately and has been allocated significant resources for studying these foods, and soy has grown to be among the best-selling vegetable in the world.

Another study at the University of California Berkeley has new evidence that strengthen the reputation of healthy food to plant soybeans. The study published in the journal Cancer Research shows that mice that had applied to the skin an extract of soy protein had significantly lower rates of skin cancer than their colleagues on the cage which was not done this treatment. Although the prospect of preventive pills  skin cancer contain soy protein which is quite removed, more accessible seems to be using these proteins in sunscreen.

Breast cancer incidence is rarely in regular consumption of soy.

Researchers at Harvard have discovery that rats treated with izoflavone for two weeks and then injected with cancer cells had far fewer tumors developed. According to the results of research conducted in Singapore, the incidence of breast cancer is inversely proportional to the regular consumption of soy. Genistein, the main izoflavon of soy, has a property,  reduce the growth of blood vessels that tumors feeding (anticancer effect). Soy has higher protective effect when consumed before puberty, after menopause, the effects are uncertain. Also contains a specific fatty acid, alpha-linolenic acid which decreases the risk of heart disease independent of cholesterol reduction. Mammary cells contain estrogen receptors that can bind estrogen just as I put a key in the lock. This stimulates the cell nucleus that ultimately lead to proliferation (multiplication) cell.



Izophlavone of soy  are some weak estrogens, they are attached to receptors on cells, but does not affect the core and leaves no longer be set on estrogen receptors.It's like I enter a key in the lock wrong, we can not twist, but no other in place we can not enter.