OMEGA - Dietary Intervention - COPD Trial

Inclusion Criteria:

* Age ≥ 40 years,
* Physician diagnosis of COPD,
* Global Initiative for Obstructive Lung Disease (GOLD) Stage II-IV disease with Forced Expiratory Volume in the First Second (FEV1)/ Forced Vital Capacity (FVC) \<70% and FEV1 (% predicted) \<80%. IF FEV1/FVC \<70% and FEV1 (% predicted) ≥ 80%, additional requirement will be asked: CAT score ≥ 10. Also, IF available for screening purposes: participant can provide a previous pulmonary function testing (PFT) report within the last 6 months.
* Tobacco exposure ≥ 10 pack-years,
* Poverty criteria as determined by residing in a neighborhood with ≥10% of residents living in poverty, consistent with the definition of poverty area OR not access to private health insurance, OR only completed high school education or less.
* Low omega-3 intake (reported daily intake of EPA+DHA intake \<500 mg via diet and/or supplement) at the screening visit, and
* Willing to comply with dietary recommendations

Exclusion Criteria:

* Participant planning to change residence during study period,
* Other chronic lung disease, except those with history of asthma if it felt by the investigator not to be a primary diagnosis.
* Pregnancy or breastfeeding and
* Reported unwillingness to eat seafood.