The fungus has a characteristic that there is not much difference in taste between raw fungus and cooked fungus. If you don't believe me, you can try, fully soaked fungus and blanched fungus tastes almost the same. Of course, not fully soaked fungus tastes a little hard. Therefore, whether or not to blanch cold fungus is not because of the difference between raw and cooked. The fungus should be soaked before eating, and during the soaking process, some bacteria and fungi will grow on the surface of the fungus. The surface of the long soaked fungus is a little sticky to the touch, it is because of the contamination of bacteria and fungi breeding. Especially in the summer when it is hot, soaked fungus is particularly easy to deteriorate. Every summer, there are people who are poisoned by eating spoiled fungus.

So, it's important to keep the fungus soaked for too long. Even if the soaking time is short fungus, in fact, there is still a little bacterial contamination. Blanching with boiling water can play a role in disinfecting and sterilizing, so that when you make cold fungus, you don't have to worry about getting sick to your stomach.

Fresh fungus contains more porphyrin, which is a very sensitive to the light of the material, in the strong light irradiation will decompose to produce some harmful substances. If you eat more fresh fungus, and long exposure to hot sunlight, it is possible to produce phototoxic effects, causing severe solar dermatitis.

The good thing is that it's almost impossible to eat fresh fungus, we all eat dried fungus. Fresh fungus in the process of drying, most of the porphyrin substances will be decomposed, so the porphyrin content in the dried fungus is very small. And then after the process of soaking in water, and a considerable part of the porphyrin dissolved into the water. Therefore, under normal circumstances, even if the raw fungus to do cold dishes, will not eat too much porphyrin.

But one group of people is an exception. These people congenital lack of enzyme metabolism porphyrin, porphyrin in the body is easy to accumulate, once do not pay attention to sunscreen, will get solar dermatitis, which is called porphyria. People with this congenital disease, eat fungus is sure to blanch, high temperature blanching can destroy the vast majority of porphyrin.

Said here we should understand, cold fungus or blanch a little better. However, the blanching time should not be too long, minutes on the clock, because the fungus once cooked for a long time, it will become soft and collapsible, not delicious.