 Dietary intervention efficacy trials are distinctly lacking in asthma research. This pilot study aims to provide effect size estimates and justification, clinical trial and intervention feasibility data, and procedural materials for a full-scale randomized controlled trial that will determine the efficacy and mechanisms of action of the Dietary Approaches to Stop Hypertension DASHa recommended dietary pattern based on proven cardiovascular benefitsas adjunct therapy to standard care for adults with uncontrolled asthma. 