Myth: Salt in your diet causes high blood pressureIn the 1940s, Walter Kempner, a researcher at Duke University, North Carolina, became famous for using salt restriction to treat people with high blood pressure. Later, studies confirmed that reducing salt could help reduce hypertension. But you don't have to avoid salt entirely, says Sara Stanner, of the Nutrition Society. "Adults need a small amount of sodium in their diet to maintain the body's fluid balance."Average salt intakes have come down in recent years, mainly due to product reformulation. But it's still the case that many of us consume too much salt – around 9g a day instead of the maximum recommended dose of 6g per day – around 75 per cent of which is in processed foods such as soups, sauces, sandwiches and processed meat."People...