Here’s some depressing news: people who drink four cans or more of diet soda are 31 percent more likely to report being depressed than people who don’t drink the stuff, according to research conducted at the U.S. National Institute of Environmental Health Sciences. Wait, there’s more: people who drink regular soda are 22 percent more likely to report depression. What should a person who doesn’t want to be depressed drink? The researchers also found that people who had four or more cups of coffee a day had a roughly 10 percent lower risk of depression. HealthDay reports on the findings, which are based on more than 260,000 Americans aged 50 to 71 who reported on their usual beverage habits and their history of depression.