Whole Food Plant-based Diet Effect on Obstructive Sleep Apnea

Inclusion Criteria: * Daytime sleepiness with ESS score ≥ 5. * Patient's prior sleep study with AHI between ≥ 10 and ≤ 45 (4% scoring criterion). * On treatment for OSA, failed or not willing to use all other OSA treatment options * Has access to a weight scale at home or able to come into the Sleep Clinic to be weighed after the 8-week plant-based diet period. Exclusion Criteria: * Pregnancy or lactation. * Current use of a vegan diet. * BMI ≤ 22. * Complex, central sleep apnea. * Pre-existing significant degree of cardio-pulmonary disease-heart failure with reduced EF of 35 or lower, unstable arrythmia, severe degree of pulmonary hypertension, severe degree of obstructive or restrictive lung disease including COPD and Interstitial lung disease. * On weight loss medications or starting new exercise regimen during the 8-week plant-based diet period.