Is your teenage daughter popping pills to shed weight? Beware she may be at an increased risk of harming hormones growth as well as mental health researchers warned. The findings showed that diet pills are unsafe for all ages but especially for teenagers due to the presence of toxic chemicals in the supplements. These pills interfere with the body systems and result in nutritional deficiencies particularly of iron and calcium the researchers said. In growing children and teenagers even a marginal reduction in energy intake can be associated with growth deceleration dailymail.co.uk quoted the Canadian Pediatric Society researchers as saying.