What happens when tempeh is fermented too long

Tempeh that has been fermented for too long can become sour. Tempeh fermentation time is too long will make tempeh corruption and spoilage, and in the process of corruption and spoilage will produce toxins, if you eat spoiled sour tempeh may lead to physical discomfort. Tempeh is a traditional Chinese specialty fermented soybean seasoning. Black beans or soybeans as the main raw material, the use of Trichoderma, Aspergillus or bacterial protease, decomposition of soy protein, to a certain extent, with the addition of salt, wine, drying and other methods to inhibit the enzyme's vitality, to slow down the fermentation process and made. There are more types of tempeh, according to the processing of raw materials are divided into black tempeh and yellow tempeh, according to the taste can be divided into salted tempeh, light tempeh, dry tempeh and water tempeh.