Natto contains high content of protein and purine, which can induce gout and increase the burden on the kidney. Gout patients with purine metabolism disorder and patients with elevated blood uric acid concentration had better not eat more. Patients with chronic renal insufficiency are not suitable for eating; Not suitable for patients with postoperative wound unhealed.

Natto is the best for dinner. Through experiments, experts believe that nattokinase can dissolve thrombus between 1 hour and 12 hour. According to statistics, the onset time of various thrombi such as cerebral infarction and myocardial infarction is mostly in the early morning and Monday. Therefore, it is best to have dinner every night or Sunday.

Eat as little as possible without heating. Nattokinase is not heat-resistant, and its activity disappears when heated to 70℃. So it is best to eat raw.

You must insist on eating every day. After nattokinase entered the body, its activity remained 12 hours. Therefore, it is ideal to try to eat 30- 100g every day.

You can eat it after the shelf life is slightly over. The shelf life of natto is one week. During the period of low-temperature storage in refrigerator, natto is still undergoing slow low-temperature mature fermentation, and nattokinase and vitamin K2 are also increasing. However, although it can still be eaten after the shelf life, it is just that Bacillus natto continuously decomposes protein for survival, and the odor gradually increases.