The cooked black fungus can be eaten if kept in the refrigerator overnight. The research results also help us eliminate our doubts about whether nitrite will increase during the storage of fungus.

The researchers compared the changes in nitrite content of fresh fungus at room temperature and refrigeration. The results found that after soaking for 24 hours, whether it was stored at room temperature or refrigerated, the nitrite content changed. Nitrate levels will decrease. Therefore, the soaked fungus will be safer if left overnight. Just to avoid spoilage and smell, it is better to keep it in the refrigerator. Extended information

When cultivating fungus, people will add urea, ammonium salt and other nitrogen-containing substances to the culture medium. These substances will be used by microorganisms to produce nitrite. Therefore, there is often a small amount of nitrite in fresh fungus.

Fungi such as fungus easily accumulate nitrite, but a recent study pointed out that the nitrite content in fungus is much lower than the standard for fresh vegetables. In addition, the nitrite content of fungus will be lower after soaking. Because nitrite will be lost with water during the process of soaking and repeated washing, so soaked fungus is safer than fresh fungus.

People's Daily Online - What you need to know about your diet: Soak fungus for 24 hours