Natto is a soybean product fermented by natto bacteria. It is rich in a variety of amino acids, vitamins, proteins and active enzymes. It has a number of biological activities, such as thrombolysis, prevention of osteoporosis, antibacterial, ... Natto is perhaps the healthiest soy product. That's because this fermented food provides beneficial probiotics along with supporting bone health, digestion and heart health. Natto is a traditional Japanese food made by fermenting soybeans with a bacterium called Bacillus subtilis. It is high in protein, fiber, vitamins, minerals, and vitamin K2, and may have positive effects on gut health and bone metabolism. Natto is perhaps the healthiest soy product. That's because this fermented food provides beneficial probiotics along with supporting bone health, digestion and heart health.