Fresh natto has good thrombolytic effect because of its high nattokinase content, and contains many substances such as vitamin K, vitamin E, lecithin and linolenic acid, which can scavenge free radicals, delay aging, promote children's brain development and reduce the risk of Alzheimer's disease. Therefore, it has attracted more and more attention and become a necessary food and health care product on the table. The key to fully absorb the nutrition of natto is how to make fresh and good natto. Royalstar natto machine, as an expert in natto production, has the characteristics of "fast, good and economical" and has become an essential helper for natto health people.