Lemons along with many other citrus fruits are known for containing lots of vitamin C, which acts as a rather powerful antioxidant. You will find that this fruit can destroy free radicals which can cause all sorts of health problems. It will be important to get a decent amount of lemon or lemon juice in your diet if you have problems with high blood pressure.
While there is no food that can lower blood pressure on its own, this one can certainly help. Lemons have also been known to help with lowering of cholesterol levels and acting as a natural laxative, so those who suffer from constipation will be able to get some relief by consuming enough of its juice.