What are the functions of nattokinase and Vitamin K2, which are contained in natto?
It is said that natto became a popular food in the Edo period, and that the voice of natto sellers was constantly heard in the city of Edo. Regarding the effects of natto, there are many anecdotes concerning its efficacy for stomachache and flu, and for helping women give birth. This is because natto has a high nutritive value and is easy for the body to absorb. In addition, natto has an antibacterial effect. In the old days, food poisoning was very common, and people used natto in order to prevent cholera, typhoid and dysentery. Natto is highly antibacterial, and also contains di-picolinic acid, which suppresses O-157. In a food dictionary of the Edo period, it is written that natto neutralizes poisons and stimulates the appetite. Neutralize poisons refers to an antibacterial effect. Recently, it has been found that natto contains di-picolinic acid, which suppresses O-157, and that natto has an antibiotic effect. Natto suppresses the growth of harmful bacteria while encouraging the gr