It is known to all that the nutritional value of mushroom is rather high. Mushroom contains abundant inorganic salt, vitamins, protein and cellulose. The high content of cellulose can effectively prevent constipation and decrease the cholesterol in the blood. At the same time, mushroom is regarded as a good choice to prevent liver cancer. However, some people think mushroom can threaten the liver. Can mushroom really prevent liver cancer or hurt the liver? In fact, high-quality mushroom can be beneficial to the liver. If the food has been polluted by the heavy metals, the liver can be seriously threatened. 

Mushroom contains abundant selenium which can help the human body prevent cancer and protect the liver. According to the medical research, the level of selenium inside the human body keeps a close relationship with the formation of cancer. The research also finds out that the content of selenium in the soil and diet also keeps a close relationship with the disease rate of cancer. If the content of selenium in the soil and diet is high, the disease rate and mortality rate of cancer is low. Mushroom is the best source of selenium. People who are always drinking in daily life can prevent liver diseases by eating mushroom frequently.

Although the nutritional value is rather high, mushroom can gather heavy metals greatly. Nearly all the heavy metals like lead and mercury can be gathered. According to the research in 2007, among all the kinds of mushroom, straw mushroom has the strongest ability of gathering heavy metals. For example, the content of mercury contained in straw mushroom is much higher than the standard level. In fact, during the growth period, mushroom is not afraid of heavy metals. However, in the polluted environment, the excessive heavy metals can be absorbed by mushroom, which can finally affect the physical health of the human body. Some people like to use silt to breed mushroom. Various nutrients are contained in silt. The content of heavy metals in it can also be high, which can cause the serious pollution of mushroom. It is difficult for the human body to resist the danger caused by the excessive heavy metals for a long time.

Therefore, it is important for people to choose high-quality mushroom in daily life so as to make full use of the nutrients like selenium and vitamin D to improve the physical health. At the same time, the polluted food should be effectively avoided.