According to a 2012 research published in the journal Public Health Nutrition, those who ate junk food were 51% more likely to exhibit indications of depression—and the more junk food the study participants ate, the more likely they were to be unhappy. The study authors speculate that the increased intake of refined sugars and saturated fats may cause the body to produce more stress hormones than it needs, which could have negative effects on mental health. Previous studies have shown that those who eat fast food regularly are more likely to experience anxiety and depression. A study conducted by the Harvard School of Public Health found that teenagers who ate at fast-food restaurants often were more likely to report symptoms of depression or anxiety. Another study revealed that women who ate at fast-food restaurants about once per week had higher rates of depression than those who never went near a drive-through window! Those who work in the industry can attest to the impact that the pace of work has on employee happiness. Fast-food workers tend to be young, low-wage, part-time employees who suffer from obesity rates equal to those of adults. Studies show that those who work in the industry are more likely to report poor mental health than anyone else except drug addicts and homeless people.