You may think that low-calorie or low-sugar varieties of your favourite soft drinks are healthier than full-sugar alternatives, but researchers have uncovered a potential link between the sweeteners they contain and depression. In a US study of more than 250,000 people, those who frequently consumed artificially-sweetened drinks were more likely to suffer from depression. In fact, those who drank four cans of diet drinks each day increased their risk of depression by around a third. Try swapping your diet drinks for healthy, fresh, home-made fruit and vegetable juices. No, you don’t need to add sugar and yes, they taste amazing!