A Double-Blind, Randomized, Vehicle-Controlled Phase 2 Study to Assess the Efficacy and Safety of GX-03 in Adult Subjects With Moderate to Severe Atopic Dermatitis (Eczema)

Participants must meet all of the following criteria: * Adults aged 18 to 80 years, inclusive * Male or female subjects in good general health as determined by medical history * Presence of visible eczematous skin with disease severity consistent with moderate to severe eczema, as assessed by: * Eczema Area and Severity Index (EASI) or Validated Investigator Global Assessment for Atopic Dermatitis (vIGA-AD™) * Ability to read, understand, and provide written informed consent in English * Willingness and ability to comply with study procedures, including study visits and daily topical application * Agreement to use only the assigned study product on designated areas of interest for the duration of the study Exclusion Criteria Individuals meeting any of the following criteria will be excluded: * Pregnant, breastfeeding, or planning pregnancy during the study * Presence of any skin condition or dermatologic disease that could interfere with study treatment or assessments * Use of systemic or topical immunosuppressive therapies, including corticosteroids, within 3 weeks prior to enrollment * Use of anti-inflammatory medications (e.g., topical steroids, ibuprofen, celecoxib); steroid nasal or ophthalmic drops are permitted * Use of topical medications at the test sites within 72 hours prior to enrollment * Damaged or altered skin at or near test sites (e.g., sunburn, tattoos, scars, uneven pigmentation) that could confound evaluations * Any medical condition that, in the investigator's judgment, places the subject at undue risk or compromises study integrity