Two sticks of celery only contain seven calories! This vegetable is rich in potassium which helps to maintain healthy blood pressure. Celery also helps the kidneys to function efficiently and to hasten the excretion of waste. It contains an anti-inflammatory agent which can relieve gout. It was used in the Orient to treat hyper-tension. Steaming or lightly boiling celery helps to reduce nitrate levels. And it is delicious!