Preventive effect by consuming isoflavin from soybeans or soybean products
Entered 2024.01.13 10:15 Views 11 Entered 2024.01.13 10:15 Modified 2024.01.13 10:02 Views 11 A component called isoflavin in soybeans and soybean products has been shown to help prevent breast cancer recurrence. [사진=게티이미지뱅크]
Research results have shown that increasing the intake of legumes, including soybeans, and nuts has a significant effect in preventing the recurrence of breast cancer.
The research team, led by scientists at Johns Hopkins Kimmel Cancer Center in the United States, conducted 22 major studies focusing on soybeans, lignans (a type of polyphenol found in various plants such as seeds and nuts), cruciferous vegetables such as cabbage and broccoli, and green tea. analyzed.
The research team also examined the effects of phytonutrients (bioactive substances found in plants) found in these foods.
Research results have shown that consuming a lot of isoflavones, a phytochemical abundant in soybeans and other legumes, reduces the risk of breast cancer recurrence by 26%. The effect was greatest when taken at 60 mg daily, which is equivalent to 2 cups of soy milk, 3 ounces (85 g) of tofu, and half a cup of cooked beans.
Isoflavones were found to reduce death from breast cancer by 12%. This effect was highest when eating 1 or 2 servings of soy foods per day. Isoflavones, found not only in legumes but also in nuts, have a similar function to the female hormone estrogen and are called phytoestrogens.
The American Cancer Society advises women who worry that it may not be safe to eat beans after a breast cancer diagnosis because the isoflavones in legumes can act like estrogen in the body: “Although it’s better to be sure. Although much research is needed, some studies suggest that consuming soy foods may lower the risk of breast cancer recurrence. “While eating soy foods does not seem to pose any risks, the evidence is not yet clear on the effects of consuming legumes or isoflavone supplements, which often contain significantly more isoflavones.”
The research team also analyzed lignans in several plants, such as seeds, nuts, legumes, whole grains, fruits and vegetables. Flaxseeds, cashews, broccoli, and Brussels sprouts contain particularly high concentrations of lignans.
High levels of enterolactone, which is formed when lignans are broken down in the digestive system, were associated with a 28% lower risk of dying from breast cancer and a 31% lower risk of premature death from all causes.
The research team said, “Lignans and legumes were so effective that breast cancer survivors were recommended for use in all dietary guidelines,” and “However, other foods and nutrients showed suggestive results, although we do not have sufficient data.”
For example, the research team found that drinking a lot of green tea was associated with a 44% reduced rate of breast cancer recurrence in women treated for stage 1 or 2 breast cancer.
“These studies were conducted among women who had undergone medical or surgical treatment for breast cancer, and these foods and phytonutrients should not be considered alternatives to treatment,” said Channing Parler, M.D., professor of oncology at Johns Hopkins University and a member of the research team. emphasized.
The results of this study (Phytonutrients and outcomes following breast cancer: a systematic review and meta-analysis of observational studies) were published in the journal JNCI Cancer Spectrum of the National Cancer Institute.
Reporter Kwon Soon-il
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2024-01-13 01:15:24
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