Whole-food plant-based diet reduces daytime sleepiness in patients with OSA.

Consumption of a diet high in saturated fat has been associated with daytime sleepiness. A whole-food plant-based (WFPB) dietary pattern, which is low in saturated fat, has been shown to be beneficial in a variety of health conditions. We assessed the effect of a short-term (21 days) WFPB diet intervention on daytime sleepiness in 14 patients with obstructive sleep apnea (OSA). We found a mean decrease of 3.8 points (SD = 3.3, p = 0.003) on the Epworth Sleepiness Scale (ESS) after switching from a standard Western diet to a WFPB diet. Our results suggest that a WFPB diet could be a viable dietary intervention to reduce symptom of daytime sleepiness.