FIRE-Diet: Food as an Intervention to Reduce the Effects of Woodsmoke Exposure on Respiratory Health

Inclusion Criteria: * Healthy, and specifically with no respiratory disease * Not taking any supplements, or willing to abstain from supplement use for 4-weeks prior to study start and the whole duration of the study, * Must currently consume, on average, less than 2 servings of fish per week and fewer than 5 servings of fruits and vegetables per day based on screening questionnaires. * Must have a null GSTM1 genotype determined at screening. * Must be able to provide a sufficient sputum sample during the screening visit. Exclusion Criteria: * Pregnant or planning to become pregnant during the study period. * Health conditions that would pose an unacceptable risk of dietary change, or conditions that are uncontrolled based on principal investigator's judgement. * Actively attempting to lose weight. * Frequent wood smoke exposure (e.g. at home or employment). * Unable to store provided meals and food safely. * Food allergies/intolerance or food aversion preventing adherence to the intervention diet, or unwillingness/medically unable to adjust diet in line with the intervention. * Relocation during the study period to an area which will prevent food delivery. * History of smoking tobacco, marijuana, or and other substance or vaping within the past 6 months, or having smoked the equivalent of 0.5 pack-years ever. * Body mass index (BMI) \<18.5, as determined during the in-person screening visit.