We'll be sure to add one to every fruit smoothie!High blood pressure is sometimes known as a “silent killer,” because it rarely shows any clear symptoms.The British Heart Foundation (BHF) says that while about 14 million people in the UK have it, they suggest five million cases may go undiagnosed. Exercising and not drinking too much alcohol can help to keep your blood pressure in check, the BHF adds. Cutting your salt can help too.But a new study from the