A study of more than 250,000 service members begun in 2001 released some preliminary findings on Friday, to celebrate the effort’s 20th anniversary.

The largest and longest-running health research in military history will soon embark on a study of military-connected adolescents. The Study of Adolescent Resilience, or SOAR, aims to capture the experiences of military-connected adolescents and their parents, to help inform the services provided by military family readiness programs.

A study of Global War on Terror veterans found that those who deployed were at less risk of dying from cancer than their fellow troops who didn’t deploy, possibly because those sent overseas were healthier in the first place, according to a paper published Wednesday in the the journal Cancer Epidemiology, Biomarkers and Prevention.

Deployed women who underwent "combat-like" experiences in Iraq and Afghanistan are much more likely to report sexual harassment and sexual assault compared with other deployed women, according to a new study.

A new study by the Department of Veterans Affairs found there is no difference in the chances of developing post-traumatic stress disorder, or PTSD, between males and females who have similar experiences, combat included.As a result of carefully looking at veterans' medical histories and life experiences, researchers said the number of PTSD cases among veterans caused specifically by service in Iraq and Afghanistan may be lower than thought.

Almost half of U.S. military personnel use dietary supplements, and many of them are seeking bodybuilding, weight loss and sleep benefits, according to a recent survey of more than 100,000 members of U.S. forces.

The Millennium Cohort Study is currently enrolling invited personnel and expects to add 50,000 service members to reach a goal of over 200,000 participants by early 2012.

The Department of Defense's largest longitudinal study in military history received an endorsement from the Army's surgeon general Sept. 19, emphasizing the importance of the Navy-led study across the military services.

According to researchers, recent reports suggest U.S. service members who deployed in support of conflicts in Iraq and Afghanistan have higher rates of new-onset asthma than those who did not deploy. Millennium Cohort Study researchers aimed to determine what risk factors may be associated with developing asthma, including combat deployment, among study participants.