Soaking time varies for different varieties of fungus. Generally using cool water soaking takes at least about 3-4 hours to fully soak. While the soaking time in hot water is relatively short, basically about 20-40 minutes. You can also use heating appliances such as microwave ovens to speed up the soaking time of fungus, which can be done in 3-5 minutes when the speed is faster. The different ways of soaking also differ slightly in taste. The texture of fungus soaked in cool water is more crispy, while the texture of fungus soaked in hot water is soft, so you can choose the preferred soaking method according to your personal preference. However, it is important to note that fungus is a kind of mushroom and is easily exposed to bacteria and fungi during the growth process. When dried into fungus, some pathogens can cling to the surface of fungus, while the soaking process, the humid environment is suitable for microbial proliferation, so more than 8 hours of soaking can easily trigger fungus mold, which may cause food poisoning after consumption and symptoms such as nausea, vomiting, dizziness, diarrhea, etc. It is recommended to seek medical treatment promptly. In addition, fungus should not be eaten directly after soaking, it needs to be fried, steamed, blanched and other treatments before consumption. Mullein is rich in minerals, vitamins, dietary fiber, iron and other nutrients, so it is good for the body’s nutritional supplement in moderation.