A vegetarian or vegan diet may be increasing the likelihood of depression, a US-based study has found. People with a plant-based diet were twice as likely to take prescription drugs for mental illness and nearly three times as likely to contemplate suicide. The report, which looked at more than 160,000 people, also found that a shocking one in three vegetarians suffer from depression or anxiety. Researchers reviewed 18 studies examining the relationship between mental health and eating meat, involving a total of 160,257 participants. They concluded that vegetarians and vegans had “significantly” higher rates or risk of depression, anxiety and...