纳豆是一种大豆发酵制品,作为日本人的主要佐餐食品已有1000多年的历史了,深受日本人民的喜爱。日本是世界上人类寿命最长的国家,除了优良的自然环境外,更重要的是日本人的膳食结构中,发酵食品对身体的营养保 Natto is a fermented soybeans products, as the Japanese main table food has more than 1,000 years of history, by the Japanese people’s favorite. Japan is the country with the longest human life expectancy in the world. In addition to its excellent natural environment, what is even more important is that in the diet of Japanese people, the nutrition of fermented foods on the body