Celery is a high-fiber food and one of the vegetables that people often eat. According to experts engaged in obesity research, celery generally provides less calories than the human body needs for digestion. Because the water in celery accounts for 95%, and the heat that a celery human body can digest only contains about 6 kilocalories. This is because celery contains too much cellulose, and the human body only absorbs a little energy left, and the rest is almost indigestible cellulose. The rest just passes through the intestine, so the energy consumed actually exceeds the energy we replenish.