how long does natto last in the refrigeratorclarksville basketball
It should form strands easily if it is done. Natto is a type of fermented soybeans that is popular in Japan. Refrigeration is a must if you want to enjoy the authentic flavor for a week, but freezing is also an option. Those given the probiotic strain were 55% less likely to suffer from a respiratory infection over the four-month study period (45). If you choose the second option, you will need to monitor the defrosting process to ensure natto isnt exposed to a suboptimal temperature for too long. It has a long history and is well-known for promoting better digestion and improving bone health. Others say that natto is safe to eat without heating it, and that the smell and taste of the beans are enough to warn you if there are any harmful microorganisms present. This is the most traditional way to consume natto, but other popular and old school ways exist. To avoid. )Continue, Read More Is Cheddar Cheese Vegetarian? 2. poktanju 3 yr. ago. Drain the beans and place them in a large saucepan. If you have pre-packaged natto, it will typically last for 7 to 10 days in the refrigerator. So why not try to change that? How Long Does Boiled Egg Last In The Fridge, How Long Can Ground Beef Stay In The Freezer, How Long Are Hot Dogs Good For After Opening, How Long Does Chicken Take To Defrost At Room Temp. In fact, several studies show that nattokinase supplements reduced blood pressure by around 35.5 mmHg in participants with initial blood pressure values of 130/90 mmHg or higher (32, 33). Natto is a Japanese fermented soybean dish that has been around for centuries. NYrture Food LLC1040 Metropolitan Ave, DBrooklyn, NY 11211, Email: natto@nyrture.comPhone: (833) NYNATTO [696-2886]. Lactic acid bacteria produce lactic acid, which makes natto seem stringy. In this blog post, we will walk you through several . What Is Natto Made Of? The fermentation process lasts between 6 to 12 weeks. To use alternative beans, follow the same procedure and make minor adjustments to preparation of the beans and culturing time. FREE SHIPPING OVER $50! Get the Last 24 Hours for Novato, CA, US. Also, check the best by date to avoid freezing natto that has been frozen for some time stores that sell natto often package it in Styrofoam containers and only cover the product with protective plastic. The longer it is stored, the more pronounced the flavor will become. You soak and cook the beans then mix the packet of natto into the beans thoroughly and ferment for 12-24 hours depending on temperature and how you like your natto Will taste the same as store bought What are the advantages and disadvantages of pressure cooking?Pressure cooking is a method of cooking food under high temperature and pressure. For longer storage, refrigerate the unwashed eggs from the get-go; they'll last in the fridge for 4-5 weeks. Can you get sick from eating expired butter? In the early 1900s, scientists isolated the bacteria that forms natto. It lasts for 2 weeks in a refrigerator. Easy to do Natto made this way is really quite simple. Eating fermented foods with live probiotics can have powerful benefits for your body and brain. Expired natto may also have a strong odor, which could give you clues that it is no longer safe to consume. The fermentation process it undergoes reduces its antinutrients, increases its beneficial plant compounds and helps your body absorb the nutrients that it contains. Natto can improve digestion. Natto is very popular in Japan and other Asian countries. A.Natto can be stored for several months in the refrigerator. Once it's cool, store in the refrigerator overnight to promote further fermentation. It can be traced back over 2,000 years and is considered a delicacy in Japan. Natto is rich in probiotics, vitamin C and several minerals, all of which contribute to a healthy immune system. 2. If you dont pay attention, you might end up burning your hands How to fry pizza rolls? Many Asian specialty markets sell combination yogurt/natto makers. These gases help to make natto taste sour and acidic. Frying pizza rolls is easy if you follow these steps:, Read More How to fry pizza rolls?Continue, Do you ever struggle to stay awake during lectures? How long can natto starter be stored? Natto has long been recognized as one of Japans most unique traditional health foods. This might not be a how-to store natto tip, but it is something to consider. These enzymes are what give natto its characteristic smell and flavor. HomeKitchenTalk.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. When the enzyme Nattokinase is heated to a temperature of 150 degrees Fahrenheit or warmer for more than 10 minutes, the enzyme loses its effectiveness. Read More Is Tofu Fermented? Here are 8 tasty, nutritious. It is somewhat similar to the one of bacterial surface aging cheese like Limburger from Belgium, Liederkrantz or Brick or Cheddar from the US, St. Paulin or Brie from France, Muenster from Germany and Bel Paese from Italy. How Long Can You Keep Natto in the Freezer? However, you shouldnt be deterred by this. 2023 Home Kitchen Talk - WordPress Theme by Kadence WP, Natto vs. Miso (Similarities and Differences Explained). To store natto properly, place it in a sealed plastic bag and refrigerate it. This process results in a slimy white substance that is sometimes referred to as natt . Is it recommended to eat NATTO with mustard? In warmer temperatures, natto can culture more quickly. Its often eaten as a side dish, or as an ingredient in sushi and other dishes. Natto is not the type of food that can be stored for too long and should be consumed as soon as possible. Having eaten it for breakfast in Japan many times and being a former chef, I can say this it would take a lot for natto to go bad, as the process to get it to the consistency it is involved the starches and enzymes in the soya beans to be broken down and fermented, so in a sense, it is already bad. However, these are just amino acid crystals and the product is still edible and safe to consume at this stage, but it wont be very pleasant tasting. Some people find the smell so offensive that they avoid natto altogether. The good news is that natto usually lasts about two weeks after it's expiration date. Researchers report that probiotics can help reduce gas, constipation, antibiotic-associated diarrhea and bloating, in addition to symptoms of inflammatory bowel disease (IBD), Crohns disease and ulcerative colitis (15, 16, 17). However, it does not last very long in the refrigerator. Commercially, natto tends to have additives such as soy sauce, sugar, flavor enhancers and preservatives. A dry natto cannot form strands. People who enjoy an especially pungent natto may wish to culture for 30-36 hours. Here are the 12 best vegan protein powders. Natto is safe to consume if refrigerated properly. Natto is safe for most people to eat, though individuals on blood-thinning medication or with thyroid problems should consult their doctor before adding natto to their diet. However, you may add NATTO to your favorite pasta dish, to an omelet or hot dish of choice at the end of preparation and NATTO will keep its nutritional integrity. The longer it is stored, the more pronounced the flavor will become. Fermentation is common in Asian cuisines, where it adds flavor and texture.While natto does go bad, it wont spoil or rot. Mix cooked beans and Natto beans well while cooked beans are still hot. Fermentation is a process driven by microorganisms. Yoghurt: 2 - 6 weeks. Another option is to take the natto out of the freezer and place it in a room temperature setting. So, please check the expiration date before eating it. So essentially, the longer you store natto, the worse it tastes. Editor's Picks in Diet and Nutrition Its a good option for children and the elderly, as its softer and easier to digest. Natto is usually served with soy sauce and is often used as a condiment in sushi or ramen. Still, if you have more natto than you can eat in a reasonable amount of time, freezing it is a viable option. Here's how to marinate tempeh (8 ways!) Instead, those who enjoy this unique Japanese dish will need to defrost it properly and prepare it to their liking. Buttermilk: 1 - 2 weeks. Heres How Much Protein You Need in a Day to Build Muscle. Some stores sell hikiwari natto, which is basically crushed natto. That depends on your preference. If youre thinking about microwaving natto, be sure to speak with a doctor first because it could interact negatively with some medications. Also, as the NATTO ages, white specks will formthese are amino acid crystals that have formed on the beans, and are completely safe to eat. How much Vitamin K2 is found in a serving of natto? It is usually eaten raw, but can be cooked and served as a side dish. Follow the guidelines below for storing food in the refrigerator and freezer. But if the stringiness accomplished with mixing the sauce and mustard isnt enough, you can try heating natto up. It contains good levels of many nutrients that are important for optimal health. Natto is traditionally eaten cold but can also be served warm. Natto can relieve constipation and diarrhea. Most often, natto is made with soybeans. The soybeans and the fungus help to break down food in the intestines, which helps to improve digestion. Layer the fudge with pieces of waxed paper between each layer for extra protection to keep any . Reusable plastic bags or Tupperware are great options, but you need to be sure to let out any extra air. Fermentation can also increase palatability, nutrition, and physiological functions, and decrease undesirable substances and functions. All you need to do is sprinkle some natto over a bowl of rice and add a little bit of chopped avocado, cucumber, or any other tasty fresh ingredient you like. But it needs to be thawed first. )Continue, Read More Vegetarian Substitute for Salami: What Can You Eat Instead?Continue, Read More Vegetarian Substitute for Pancetta: What Can You Eat Instead?Continue, Read More How To Store Pressed Tofu (Answered!)Continue. Is it possible to cook hot dishes with NATTO? A. If youve ever wanted to try natto (or just wondered what its all about), then this is the post for you! What they found is that it took mega doses of nattokinase (500 mg of nattokinase for every kilogram of body weight) to have the same effect as 30 mg of aspirin. A sign of spoiled natto are tiny white specks on the surface. If defrosted nattos smell is too strong and even rancid, the flavor will be compromised. It is essential to store the sauce in an airtight container and to keep it in the coldest part of the fridge at or below 40F temperature. Adult women should have at least 90 micrograms of vitamin K per day, while males should obtain at least 120 micrograms per day, as per the National Institutes of Health. Beyond Meat (Similarities and Differences Explained), its imperative not to store natto at room temperature, Avoid defrosting natto in the oven or microwave if possible, How to Tell if Pork Sausage Is Bad (Explained! It is somewhat similar to the one of bacterial surface aging cheese like Limburger from Belgium, Liederkrantz or Brick or Cheddar from the US, St. Paulin or Brie from France, Muenster from Germany, and Bel Paese from Italy. You can consume natto for up to nine days after its expiration date. In addition to its high probiotic content, natto is rich in vitamin C, iron, zinc, selenium and copper, all of which play important roles in immune function (47, 48). Soy sauce and soybean miso paste are fermented soybeans used as a condiment for seasoning foods. Organic, non-GMO soybeans are recommended. After that, you can put it into the freezer for longer storage. These ingredients can react with the amines produced by the fermentation process to produce this unpleasant odor. Most NATTO sold in the U.S. is imported from Japan, and depending on the amount of time that elapses until the product is frozen, and the condition that the product is in during transport and storage, the fermentation process may get accelerated, leading to stronger flavors and smells. When the enzyme Nattokinase is heated to a temperature of 150 degrees Fahrenheit or warmer for more than 10 minutes, the enzyme loses its effectiveness. If the natto has expired, it may not be safe to eat. However, natto can become harmful if not stored properly. Do not wash the eggs until right before you use them. Answer: Natto can be stored in plastic bags or containers. Report as inappropriate. The recommendation I've seen on the package is five days. No matter what the cause, natto lovers around the world will find something to love about this unique food! Cheese, soy sauce, Kefir, yogurt and other dairy products, pickles, some sausages, wine, and beer are among fermented foods which have sustained and enhanced our lives for many centuries. Fermentation is a process driven by microorganisms. You can use chopsticks or a fork to mix the ingredients to create the gooey biofilm produced by the bacteria. To store fudge in the fridge, be sure you have an airtight container with a great seal. Yes indeed! Check for small, gelatinous strands forming across the surface of the beans. Natto is not the type of food that can be stored for too long and should be consumed as soon as possible. Pulse for about 30 seconds, scrape down the sides of the processor and pulse a few more times until the eggplant is smooth and all the ingredients are incorporated. By following these two steps, your frozen natto will last longer and retain the authenticity of its flavor. Natto, on the other hand, has a short shelf life and must be kept in the refrigerator. Finding The Best Healthy Kombucha For Your Gut Health, Tea For Kombucha: Discovering the Best Tea for Kombucha Making, Sign up to get the latest on sales, new releases and more , 5 Cultures You Can Use to Ferment Almost Anything, Free e-Books: Making Cultured & Fermented Foods, At room temperature (68-78F) for 3-4 weeks, In the refrigerator (40-45F) for 6 months or more, In the freezer (0-25F) for 6 months or more. Natto is a Japanese food made from fermented soybeans. Natto isnt always easy to find, so its likely youve chosen to freeze larger quantities and eat it later. You can keep natto in the refrigerator for up to three months, though its probably going to have the best flavor for about a week after you open the jar or the box. I've had frozen natto in the little styrofoam containers before, but I froze the 1 lb. One of the ways you can extend how long you can store natto in the freezer is to put the unopened container straight into the freezer. Shelf life for typical dairy products with proper storage in the refrigerator are as follows [4], [5]: Pasteurized milk: 1 - 2 week. Tofu for Stir Fry: Everything You Need to Know! In fact, it can even improve over time. Despite its strong odor during culturing, natto does not have an overwhelming taste unless it is aged. With proper storage, fudge can last in the fridge for 2 to 3 weeks. Some people serve it over pasta. This is because natto is stored in the refrigerator and it loses its flavor after a certain period of time. Soft cheese (ricotta, brie, cream cheese): 1 - 2 weeks. Shake the beans well afterward to remove the excess moisture. One way to add some extra flavor and nutrients to your day is by adding prune juice to your diet. Frozen natto first needs to thaw regardless of how you choose to eat it. Studies show vitamin K2 supplements can slow age-related loss in bone mineral density and may reduce the risk of certain types of fractures (23, 24, 25). However, natto can remain relatively good in taste for as long as a year. If you open a bag of natto and see mold growing on it, throw it away immediately. Drain the cooked beans and place them in a sterilized, oven-safe dish. For reference, a "baby aspirin" has just 81 mg of aspirin. (Solved! At room temperature, bacteria grows incredibly fast and can make you sick. Soy sauce, soybean miso paste are fermented soybeans used as condiment for seasoning foods. Annnddd, I think that covers just about everything! This process helps preserve foods and makes them safe to eat. A.Natto can be cultured in many kinds of containers. After opening a jar, we recommend consuming within two or three weeks. Instead, let natto thaw naturally. Many people love its convenience and speed. Combine the soybeans with the water containing the spores. Dr H. Sumi, currently professor of Kurashiki Arts and Science University, discovered high activity of blood clot dissolving enzyme in the sticky portion. How long will New York Natto jars keep in the refrigerator? It can be eaten fresh or cooked. Yes, the sticky string (a form of glutamic acid) includes the active ingredient, nattokinase. How long can NATTO sit under a heat lamp and maintain its taste and texture if it is being served in food service environment? Find out how much fiber you need, where to get it, and the best way to increase your daily intake. If a strong odor is detected from the culturing area, and if it has been about 24 hours, carefully open natto with very clean hands. The problem with that idea is that natto doesnt have a very long shelf life. Usually, this deadline is six to seven weeks from production, but its not considered set in stone. How To Keep Natto Fresh In Fridge? It can be eaten as a snack or as part of a meal. Natto spores, which are the primary agents responsible for the odor and taste of natto, can persist in the environment for months. Natto contains isoflavones, dietary fiber, vitamins, linoleic acid, and some minerals which are originated from soybeans, in addition, it also contains some functional compounds such as enzymes, bioactive peptides, natto kinase (fibrinolytic agent), and gamma-polyglutamic acid. Wishing you a happy week. Humans, at top of the food chain, utilizes fermentation primarily to preserve food, to avoid spoilage and enhance nutrition. This combination may help reduce cholesterol and blood pressure levels and decrease the risk of heart disease. Marinated: The flavor of tempeh can be intense on its own, but a marinade before cooking takes your tempeh to a whole new level. Kristi L. CA, CA; (Solved! There are several possible reasons why natto smells like ammonia. One way to do so is to put the frozen natto in the refrigerator and let it defrost overnight. Vegetarian Substitute for Salami: What Can You Eat Instead? They're on the underside or rear of the refrigerator (on top for built-ins), so. Read More Is Tofu Better Than Meat? Natto is generally aged in the refrigerator for 2496 hours, but those who are anxious to try their natto may do so after about three hours of aging. What is the sticky stuff in natto? See additional information. How Long Does Homemade Natto Last? Keeping the NATTO out for an hour under a heat lamp will probably lead to the beans becoming gooey and slimy and an intensification of the smell. While I understand why fresh natto would last 3-4 weeks in the fridge, will the thawed frozen natto last the same amount in the fridge, or do the bacteria die during freezing? ), Beyond Meat vs. Morningstar Farms (Similarities and Differences Explained), Gardein vs. So, here are some tips to help you store fermented soybeans properly: 1 Keep fermented soybeans in a cool place 2 Do not expose fermented soybeans to direct sunlight 3 Store fermented soybeans in airtight containers 4 Refrigerate fermented soybeans after opening 5 Always check the expiration date 6 Never eat fermented soybeans that have expired 7 Always wash hands after handling fermented soybeans 8 Fermented soybeans should be consumed within three months 9 Fermented soybeans can be stored for longer periods if refrigerated 10 Fermented soybeans are safe even if they have been frozen 11 Fermented soybeans cannot be canned 12 Fermented soybeans lose nutrients when heated 13 Fermented soybeans have a long shelf life 14 Fermented. However, you may add NATTO to your favorite pasta dish, to an omelet or hot dish of choice at the end of preparation and NATTO will keep its nutritional integrity. The fermentation process is much more efficient as the center of the bean is more easily reached. If you were to leave it on the warm counter for 3-6 months and let it get moldy and crust over, perhaps it would be bad then, but if after opening you keep it in the frig in a sealed container, I use a zip lock bag, I have had a 500-gram pack for 1 month in the frig. The whole celery can stay in the fridge for about 1 to 2 weeks, whereas the cut-up celery can last up to 4 to 7 days. Some natto enthusiasts argue that freezing it is a bad idea, but not because its unsafe. The freezer time shown is for best quality only - eggs that have been kept constantly frozen at 0 F will keep safe indefinitely. However, if youre planning to purchase and try natto, you might wonder how to store natto properly. How long does tempeh last? To store natto, keep it in the fridge or freezer. Natto readily takes to added flavors. Natto is a fermented soybean food that has a strong, unpleasant odor. )Continue, Read More Tofu for Soup: Everything You Need to KnowContinue, Read More Can You Microwave Natto? And because youre unlikely to eat it past a certain point, it does expire. Quick Action. Nowadays, the rice straw has been replaced with styrofoam boxes in which B. subtilis can be directly added to boiled soybeans to start the fermentation process. Moreover, probiotics further reduce the risk of infection and may help you recover faster if you do get sick (43, 44). Natto goes bad quickly because it contains bacteria. This prevents moisture from developing inside the container. How long does it take to cook?Pasta is often considered a simple meal, but it has some complex cooking techniques. Cover the beans with water and cook them until the beans are tender. Unopened natto lasts indefinitely if stored properly. While natto is traditionally made with soybeans, it can be made with other high-protein beans, such as garbanzo, black bean, adzuki, and others. The short time limits for home-refrigerated foods will help keep them from spoiling or becoming dangerous to eat. What are the white spots on the beans? Natto is a fermented soybean product that is eaten in Japan. How To Store Natto? Conclusion. Nonetheless, some of the studies on vitamin K2 and bone health used very high supplement dosages. Natto is easily recognizable by its distinctive, somewhat pungent smell, while its flavor is commonly described as nutty. Cheese, soy sauce, kefir, yogurt, other dairy products, pickles, some sausages, wine, and beer are among fermented foods which have sustained and enhanced our lives for many centuries. Plus, if youve purchased natto in a glass jar, keeping it in the fridge keeps it safe. Learning how to store natto correctly is essential; otherwise, the content might go to waste before you can consume it all. The flavor of defrosted natto will be inferior to fresh NATTO. Your gut contains trillions of microorganisms more than 10 times the total number of cells found in your body (11). Regardless of ones preference, its true that natto is an ancient Japanese dish and a real powerhouse among fermented foods. Natto is a fermented soybean product that can be found in most Japanese grocery stores. However, you can try a few tips to ensure the natto flavor doesnt change too much after the initial week. Its physical texture is sticky and is a natural result of the fermentation process. Some other natto bacteria produce enzymes that break down soybeans into their protein, oil and carbohydrate components. Therefore, most people keep an opened container of natto in the fridge and eat it within those two weeks. Natto is fermented soybeans. If you have fresh natto you want to save for later, freezing is a fantastic option. A.Natto is a cultured bean product, most often made from soybeans. But if youve thawed natto out, how do you prepare it? The dough is very soft and sticky, and can easily stick to the pan or oven handle. Natto is a traditional Japanese dish made from fermented soybeans. Vegetarian Substitute for Pancetta: What Can You Eat Instead? Antinutrients can also reduce the amount of nutrients your body absorbs from foods and may cause bloating or nausea in some people (18). Natto, also known as fermented soybeans, is a Japanese dish that typically consists of soybeans that have been soaked in water and then fermented with a mold. If you were to leave it on the warm counter for 3-6 months and let it get moldy and crust over, perhaps it would be bad then, but if after opening you keep it in the frig in a sealed container, I use a zip lock bag, I have had a 500-gram pack for 1 month in the frig. May I buy this in bulk quantities, if I want to purchase on a regular basis? A. During storage, the odor of natto is easily intensified due to the natural and progressive production of ammonia. Natto, or fermented soybeans, is a popular snack in Japan and other parts of East Asia. When you receive your jars, you'll see a "Best By" of 6-7 weeks. How long do raw eggs last in the freezer? Use approximately 3 parts water to 1 part soybeans. Over 40 mcg of vitamin K is in a one-cup meal. Having the right type of bacteria in your gut creates a healthy gut flora, which is linked to numerous health benefits like improved digestion (12, 13, 14). Some stores sell natto in a single serving size around three tablespoons with a packet of mustard and fish sauce. They are safe to eat. For many people, the sticky texture is a main attraction. Press a piece of cheesecloth or unbleached parchment paper over the surface to retain moisture; store in an airtight container. For the natto, you'll need 4 cups (800 g) of soybeans. Humans selectively use beneficial microorganisms to convert raw foodstuffs to fermented products, which other microorganisms cannot further spoil. Remember that natto is up to 60% moisture, as the soybeans are soaked and pressure cooked before being mixed with bacterial culture. All rights reserved. However, natto is a great fermented protein and is enjoyed in many dishes. The second reason is freshness. However, natto does spoil quickly if stored improperly. The characteristic aroma is due to Pyrazine. However, the spores will eventually die off if not consumed. Homemade Natto beans can be stored in the freezer, so it is recommended to make a large amount at a time and . How To Store Natto? In this blog post, Ill, Read More Can you get sick from eating expired butter?Continue, Fried pizza rolls are delicious, but they can also be dangerous. Any leftovers can be stored in the freezer for later use. Do not freeze natto because freezing damages the texture of the natto. Thank you for making Chowhound a vibrant and passionate community of food trailblazers for 25 years. Traditionally it is enjoyed atop a bowl of rice with green onions, pickled radish and a splash of soy sauce and hot sauce. Fermented soybeans spoil quickly if stored improperly. Highly nutritious and rich in protein, it is often eaten with cooked rice. The soybeans and fungus contain plenty of antioxidants, which are known to help protect the body against disease. Nevertheless, natto contains vitamin K1, which plays a role in blood-clotting. For long-term storage, keep them in the fridge. It is very important to know how to store fermented soybeans properly. You might be wondering how to eat frozen natto and what you can do to make it more flavorful. [1] As you rinse the soybeans, remove any shrunken or discolored beans. Many people believe that natto does not taste like miso, but in fact, they are quite similar. Its usually in styrofoam because its not easy to store or transport. containers since fresh lasts 3-4 weeks in the fridge. But it doesn't stop there. The result is a thick, pasty, yellowish-white substance that many people believe has health benefits. NATTO can be frozen please do so during its shelf life, and determine the timing by the level of fermentation you prefer. Eating natto daily (in recommended amounts) can: Yes, natto can go bad. It wasn't just any cheese and crackers -- it was a plate of the kind of cheese and crackers that I had been eating for lunch every day for months.Read More, When does ground beef go bad in the fridge, Advantages and Disadvantages of Pressure Cooking. It is usually eaten as a snack or appetizer. If you dont eat all of your natto within a week, the changes in flavor will be gradual, and youll notice the unique ammonia-like smell associated with natto and increase in strength. Alternatively, use a pressure cooker to reduce cooking time to around 45 minutes. It should not be confused with vitamin K1, which plays an important role in blood clotting. Wash the soybeans. You can sterilize the dish by boiling water in it for at least 10 minutes before use. No brussel sprouts either, taste like feet. )Continue, Read More Natto vs. Miso (Similarities and Differences Explained)Continue, Read More Is Cream Cheese Vegetarian? Answer: Natto is made from soybeans fermented with Bacillus subtilis Bacillus natto. If it is a strong smell, similar to ammonia, it means that the NATTO has over-fermented. An aging period of 24 hours to 3 days will yield a better flavor. Natto can be eaten raw, or cooked into various dishes. Its physical texture is sticky and is a natural result of the fermentation process. Can beans other than soybeans be fermented in this way? Sell by dates are used to indicate the shelf life of foods. I never eat natto before. Dont re-freeze natto, as the constant aggregation state changes will deplete its nutritional richness. In addition, the extended access to high heat will affect the texture and flavor of the dish. by Alina Petre; February 12, 2023; Natto is a traditional Japanese food made from fermented soybeans. When finished, cool and refrigerate for up to several months.