A, black fungus soaked for a long time, there will be toxins produced, not edible. Black fungus soaked in moderation, if soaked more than one, refrigerator for 24 hours, more than 24 hours, no matter whether it is spoiled or not should be thrown away.

Two, the fungus soaked for a long time will breed bacteria, so that the fungus appeared to deteriorate and tasteless, but also produce toxins, endangering the health of the body, and the fungus soaked for a long time will be relatively soft, and its edible taste will be reduced, so that the fungus is not edible.

1. Black fungus in the gelatin can be residual in the human digestive system of dust, impurities adsorption and concentration of discharged from the body, acting as a scavenger of the stomach and intestines, it is gallstones, kidney stones and other endogenous foreign matter also has a relatively significant dissolution function.

2. Fresh fungus is not edible. This is because the fresh fungus contains a "porphyrin" substances, eating fresh fungus after sun exposure will occur plant solar dermatitis, causing skin itching, redness, itching, so the fungus need sun exposure, decomposition of porphyrin, made of dried products and then sold for consumption.

3. Dried fungus need to be soaked and washed before eating, try to use warm water to soak, shorten the soaking time, soak well, running water to wash two to three times, to maximize the removal of impurities and toxic substances.