Overview The Study of Soy Isoflavones in Asthma Status: Completed Trial end date: 2012-08-01 Target enrollment: Participant gender: Summary The trial is designed to study the effects of soy supplements on asthma control. Phase: Phase 4 Details Lead Sponsor: American Lung Association Asthma Clinical Research CentersCollaborators: National Heart, Lung, and Blood Institute (NHLBI)National Institutes of Health (NIH)