This daily health update email provides summaries of recent studies on various health topics. A survey found that most people with mental illnesses experience discrimination, especially in social and work relationships. Another study reported that heroin use in the US has stabilized at high levels, with over 450 new users per day. Additional articles discussed sugar and carbohydrates being linked to obesity more than physical inactivity; exercise being associated with higher GPAs in students; high rates of pain in obese teenagers; and sedentary activity doubling mortality risk in older women.