In women's daily health care, many people know the benefits of soybean isoflavone products and think that they can prevent diseases as long as they are taken. So, is soybean isoflavone good? Next, I will tell my friends about the five benefits of soybean isoflavone to human body, and you will see it at a glance after reading it. So, what food is rich in content?
What is soybean isoflavone?
Soybean isoflavone is a polyphenol compound and a secondary metabolite formed during the growth of soybean. The main soybean isoflavones in nature are genistein, daidzein, daidzein, chickpea A and formononetin. Soybean and bean products are the main food sources of soybean isoflavones. Soybean isoflavone can combine with estrogen receptor, play an estrogen-like role and regulate endogenous estrogen, so it is called phytoestrogen. At the beginning of the 20th century, soybean isoflavone was found in plants such as soybean. Since 1950s, soybean isoflavones have been artificially extracted or synthesized, and the weak estrogenic effect of soybean isoflavones has been found. Epidemiological studies show that the incidence of cancer and cardiovascular diseases in the eastern population who eat soybeans for a long time is significantly lower than that in the western population.
Five Benefits of Soybean Isoflavones to Human Body
1, estrogenic activity. Soybean isoflavones can play an estrogen-like or anti-endogenous role in vivo, and can play a role in regulating estrogen receptors. Soybean isoflavones can improve perimenopausal syndrome. Postmenopausal women can effectively reduce the number of hot flashes and obviously improve perimenopausal symptoms by supplementing soybeans or soybean extracts for more than 3 months every day.
2. Antioxidant effect. The antioxidant effects of soybean isoflavones are mainly manifested in inhibiting the production of oxygen free radicals, inhibiting the production of hydrogen peroxide, reducing the oxidative damage of DNA and inhibiting lipid peroxidation.
3. Improve postmenopausal osteoporosis. Soybean isoflavones or their metabolites show a weak estrogen effect in postmenopausal women, and combine with estrogen receptors in osteoblasts to enhance the activity of osteoblasts, promote the production and secretion of bone matrix and bone mineralization, thus improving osteoporosis.
4. Reduce the risk of breast cancer. Soybean isoflavone may reduce the risk of breast cancer by increasing estrogen metabolism to 2- hydroxyestrone (an anticancer product). It can also inhibit the occurrence and development of cancer by resisting oxidation, promoting apoptosis and inhibiting cell proliferation.
5. Effects on cardiovascular system. The decrease of estrogen level in postmenopausal women leads to abnormal metabolism of fat and cholesterol, while the increase of blood lipid and cholesterol leads to an increase in the incidence of cardiovascular diseases. Soybean isoflavones can prevent and treat cardiovascular diseases through estrogen-like effects.
Food sources and dietary advice
Soybean and bean products are the main sources of soybean isoflavones, such as yuba, soybean meal, tofu, dried tofu, soybean milk and so on. According to the epidemiological study of soybean isoflavone reducing the risk of breast cancer, the specific recommended value (SPL) of soybean isoflavone for preventing breast cancer in premenopausal, perimenopausal and postmenopausal women is 55 mg per day. According to the clinical research results, the effective dose of soybean isoflavone to improve postmenopausal osteoporosis is generally 80 mg per day.
The possible side effects of excessive intake of soybean isoflavones in adults include gastrointestinal symptoms such as nausea, vomiting and diarrhea, as well as edema, constipation and rash. The maximum tolerance of soybean isoflavone intake in postmenopausal women is120 mg per day; There is currently no maximum limit for men and premenopausal women.
From the above introduction, we know what kind of substance soybean isoflavone is. Human studies have found that this substance can be artificially extracted and synthesized for many years. What is more noteworthy is that taking soybean isoflavones has five benefits to human body: estrogenic activity, antioxidant effect, improving postmenopausal osteoporosis and reducing the risk of breast cancer. Therefore, female friends can eat some foods with more soybean isoflavones in the future to play a health care role.