Soy sauce is healthy because it consists mostly of natural ingredients. But is that always true? Here you can read how healthy or unhealthy the spicy sauce actually is.
Soy sauce has a long tradition
Traditionally made soy sauce consists mainly of fermented soybeans. During fermentation, the soybeans are mixed with water and salt and enriched with the noble koji mold (Aspergillus Oryzae). They are then stored in wooden barrels where the soybeans begin to ferment (ferment). This procedure can sometimes take years. The soy sauce then slowly collects at the bottom of the wooden barrels.
Fermenting is an ancient method of preserving food. It works with yeast, just like the beer brewing method. Another method is enzymes that, for example, lactic acid ferment white cabbage and turn it into sauerkraut. They also ensure the necessary fermentation in sourdough so that the dough can rise. The soy sauce gets its typical flavor from the fermentation with the yeast fungus.
The making of soy sauce dates back to Buddhist monks in China and Japan. It is not known exactly when and where they first made the soy sauce. It is assumed that soy sauce dates back to ancient China (approx. 1500 BC to 220 AD), came to Japan in the 6th century and was modified into Japanese soy sauce there from the 16th century. The soy sauces known to this day were created:
Tamari soy sauce: This original soy sauce was brewed by the monks from soy, water, salt and koji ferment. It is dark brown to black and somewhat viscous.
Shoyu Soy Sauce: It is made from soybeans and wheat that are fermented together. This mixture results in a lighter and thinner soy sauce.
That’s how healthy traditional soy sauce is
The soy sauce according to the traditional recipe is definitely a healthy condiment:
Vegan: The soy sauces were made by the vegan monks to flavor their dishes.
Natural ingredients: The traditional recipe only uses a few natural ingredients. You can also find soy sauces based on this tradition in German shops.
Soybeans: Soybeans are considered healthy. The Apotheken-Umschau explains that soybeans contain valuable vegetable proteins, vitamins (provitamin A and vitamin B complex) and unsaturated fatty acids (including the healthy omega-3 fatty acid). They are also rich in minerals such as potassium, magnesium and iron. Studies suggest that a soy-rich diet can alleviate the symptoms of menopause in women. In addition, the soy protein is said to keep the arteries healthy.
Fermentation: The science magazine Spektrum explains that the fermentation process breaks down the indigestible proteins and sugars in the soybeans. This creates umami. The German Society for Nutrition (DGE) explains that umami is a taste of its own, like sweet or salty. Food containing protein in particular appeals to the sense of taste in the throat. In this way, they enhance the taste of other foods. The soy sauce can therefore serve as an alternative to glutamate – the controversial flavor enhancers E 621 to E 625.
Not everything about soy sauce is healthy
Soy sauce does not only contain healthy ingredients. Some of their ingredients can be problematic for certain groups of people.
Salt: The salt content in soy sauce can be alarmingly high, depending on the amount consumed. The USDA Food Database states that 100 grams of shoyu soy sauce contains about 5.5 grams of sodium. For tamari sauce, it’s 5.6 grams. These amounts are almost the recommended daily allowance for table salt, which is chemically composed of sodium and chloride, among other things. According to the DGE, the daily recommended value is six grams of salt. This amount is equivalent to about a teaspoon of salt. Too much salt in food affects high blood pressure. This can lead to cardiovascular disease and an increased risk of stroke.
Gluten: The Shoyu soy sauce is made with wheat and therefore also contains traces of gluten. People with gluten intolerance should therefore switch to the gluten-free tamari sauce. Some brands indicate on the condiment bottles whether the sauces are gluten-free.
Sugar: Processed soy sauces can often contain sugar, as the USDA states for tamari soy sauce, for example.
Purines: Purines are natural components of many foods. Soybean products also contain purines. Purines are linked to gout attacks. The Apotheken-Umschau points out that the diet for gout should be as low in purines as possible.
Industrially produced soy sauce: That’s still in it
In the industrial production of soy sauce, things often have to be done quickly. The fermentation process is almost always greatly shortened. Stiftung Warentest reports that even soy sauces that are brewed using traditional methods are only given between three and six months.
Sometimes the companies use the same defatted soybeans. This speeds up the fermentation process. This means that the sauce loses the valuable unsaturated fatty acids.
On the other hand, it only takes a few hours to produce it using chemical agents. These completely replace the fermentation process. Instead of the lengthy procedure of fermented soybeans, the industry simply uses soy flour.
Additives usually have to ensure the consistency and aroma. Stiftung Warentest found flavorings and colorings as well as artificial glutamate in some of the sauces tested. In a taste comparison to the traditionally produced soy sauces, the sauces with additives also performed worse. However, the test dates back to 2005, and no soy sauces have been tested since then.
Conclusion: soy sauce is healthy, right?
Flavoring food with soy sauce is basically healthy. However, note the following points:
The soy sauce should consist of traditional ingredients, i.e. without additives such as sugar and artificial coloring. Also make sure that the sauce is free of genetically modified soy. Opt for organic soy sauce instead. In our seal guide you can find out about seals that are awarded for organic products.
You should use soy sauce in moderation. Here, too, it depends on the quantity. According to the USDA, one teaspoon with six grams of soy sauce contains about 0.3 grams of salt. Tip: There is now also soy sauce with a reduced salt content.
If you use a teaspoon or two of the Asian seasoning a day, there’s nothing wrong with that. In fact, it can even help you reduce your salt intake overall. Because soy sauce enhances the taste of your meals with the natural umami of the fermented soybeans.
Another reason why soy sauce is healthy after all: It is ideal for light Asian cuisine, which is based on a wide variety of vegetables. If you also use tofu, tempeh or the green soybeans edamame, then you use the whole healthy potential of soy.