A study released in this month’s edition of the Archives of General Psychiatry looked at 1,987 adults ages 20 through 39, finding that those with the highest blood lead levels were more than twice as likely to suffer a major depressive disorder and nearly five times as likely to suffer from panic disorders as those without elevated blood lead levels. The study is a rare look at how lead exposure can affect adults, as most research to date has been focused on the side effects of lead on children.