The natto (fermented soybeans) is one of the indispensable foods to a dining table as a health food from old times.
A soybean is already transmitted in Jomon period (BC 14,000 – 300), and it is said that it is established in the Nara era (AD 710-793) as natto. In addition, it is the food which spread among people so that it is listed in the book from old times. For Sengoku period (civil war), it became a protein source and the stamina source for samurais because of abundant nourishment. "Natto selling" also seemed to peddle it every morning in the Edo era(1603-1868).
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Then what kind of nutrients will a health benefit of the natto include?
| Nutrient | Effect |
| Isoflavone | Immunity reinforcement action, Hormone balance normalization action |
| Lecithin | Intestinal regulation, Dieting, Relieving fatigue, Antibacterial sterilization effect |
| Zinc | Intestinal regulation, Dieting, Antiulcer effect |
| Saponin | Antibacterial sterilization, Beauty fair skin effect, High blood pressure control, Thromboprophylaxis |
| Protein | Bone consolidation, Menopausal disorders prevention |
| Calcium | Bone consolidation, Antiulcer, Stress-relieving |
| Magnesium | Beauty fair skin effect, Antiulcer, Antibacterial sterilization effect, Stress-relieving |
| Dietary fibre | Beauty fair skin effect, Diabetes control, Acylglycerol, Cholesterol control, Constipation restraint |
| Vitamin E | Beauty fair skin effect, Menopausal disorders prevention, Neutral fat control |
| Potassium | Beauty fair skin effect, Hypertensive prevention |
| Nattokinase | Thromboprophylaxis |
| Mucin, Polyglutaminic acid | Beauty fair skin effect |
| Vitamin B1 | Acylglycerol restraint, dieting, Relieving fatigue, Immunity reinforcement |
| Vitamin B2 | Beauty fair skin effect, Intestinal regulation, Dieting |
| Vitamin K | Bone consolidation, Anti-aging, Antiulcer |
| Bacillus natto | Beauty fair skin effect, Intestinal regulation, Dieting, Cold prevention |
| Dipico phosphoric acid | Cold and influenza prevention, Antibacterial sterilization |
| Selenium | Antioxidant action, Anticancer effect |
* It is said that the person taking high coagulant (including warfarin) should avoid the intake of the natto because the efficacy weakens.
In addition, it is said that natto is effective by eating at night (dinner).
Because the enzyme called Nattokinase included in the natto is able to dissolve a blood clot, and the effect lasts about 10-12 hours, it shall remain in effect toward the disease caused by the clot.
The time when it is easy to form the blood clot (cerebral infarction etc) is considered to be 6-8 hours after sleep, and and often becomes sick during sleep. Therefore this is because it is said you should eat natto as dinner to adjust the time of 10-12 hours when Nattokinase acts effectively in the body when there is easy to be a blood clot.
Generally, natto is often eaten with steamed rice, but it is recommended to use as an ingredient for side dishes including miso soup, toppings of curry, udon and soba noodle and more.
In addition, of course as for nothing Too much is as bad as too little. Be careful about overeating enough. It is taken by combination with other side dishes well for until two meals of days, and let's maintain your health.
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