There is growing literature on diet and COVID. This is a well designed prospective cohort study that shows an inverse association between COVID incidence/severity and quality of diet (as measured by an index of plant-based foods). Those in the top quartile for diet had way lower risk for severe COVID than those in the bottom quartile (hazard ratio 0.59). This is AFTER adjusting for comorbidities like obesity and confounders like mask-wearing and community transmission rates.
Low socioeconomics exaggerated the effect (of less plant-based diet alone) on COVID incidence/severity. This means that our education and advocacy around plant-based nutrition for low-income and minority patients has a disproportionate benefit for their health. The most vulnerable have the most to gain from proper nutrition.
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