Toona sinensis contains nitrite and is a carcinogen. However, the nitrite content in Toona sinensis is not very high, and some of it can be degraded during cooking. Therefore, moderate consumption of Toona sinensis will not cause obvious cancer risk to human body.

However, excessive consumption of Toona sinensis or long-term consumption of food containing nitrite may increase the risk of cancer. Therefore, it is recommended to eat Toona sinensis in moderation, not in excess. In addition, we should pay attention to the diversity of diet, don't just eat a certain kind of food, and keep a balanced diet.