By Dr. Priyom Bose, Ph.D. Reviewed by Lauren Hardaker Apr 28 2026 Could compounds found in everyday soy-based foods help ease COPD symptoms? New research reveals how diet, particularly isoflavones, may play a role in shaping respiratory health and disease burden in former smokers.  Study: Isoflavone Intake is Associated With Decreased Chronic Obstructive Pulmonary Disease Morbidity . Image credit: Makistock/Shutterstock.com A recent study in  Chronic Obstructive Pulmonary Disease evaluated