Benefits of celery leaves: celery leaves are many times more nutritious than stems. Celery leaves can inhibit cancer. Among them, the content of protein is 1 times higher than that of ordinary fruits and vegetables, the content of iron is about 20 times that of tomato, and it is also rich in carotene and multivitamins. Disadvantages: Celery used to be a "sperm killer". Eating more celery will inhibit the production of testosterone, thus killing sperm and reducing the number of sperm. It is reported that foreign doctors have found through experiments that the sperm quantity of healthy and fertile young men will be significantly reduced or even difficult to conceive after eating celery for several days, and this situation will return to normal after stopping eating vegetables for several months.