(Telegraph) - An ingredient found in red wine can combat the harmful effects of obesity and reduce the risk of disease in the elderly, a clinical trial has shown for the first time. When taken regularly a natural compound known as resveratrol, found in red wine and grapes, mulberries and peanuts, can offer similar benefits to low-calorie diets and endurance training. As well as lowering the metabolism – meaning the body needs less food to generate enough energy – it can reduce levels of liver fat, blood pressure and blood sugar.