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Diet COVID-19 studies. Studies analyze diet quality before infection, and use different definitions of diet quality. Recent:
Yue
Naushin
Firoozi
Zargarzadeh
Galmés
Jagielski
Galmés.
Submit updates/corrections.
Aug 12
Early, Late, PrEP, PEP Covid Analysis (Preprint) (meta analysis)
meta-analysis
Diet for COVID-19: real-time meta analysis of 15 studies
Details   • Statistically significant improvement is seen for cases. 12 studies from 12 independent teams in 7 different countries show statistically significant improvements in isolation (11 for the most serious outcome). • Meta analysis using the..
Aug 9
PrEPPEP Yue et al., The American Journal of Clinical Nutrition, doi:10.1093/ajcn/nqac219
cases, ↓19.0%, p=0.008
Long-term diet and risk of SARS -CoV-2 infection and Coronavirus Disease 2019 (COVID-19) severity
Details   Analysis of 42,935 participants showing lower risk of COVID-19 with healthier diets. Risk of severe cases was also lower with healthier diets, while not reaching statistical significance. Severity results are only provided with diet indic..
Jul 19
PrEPPEP Zargarzadeh et al., Frontiers in Medicine, doi:10.3389/fmed.2022.911273
severe case, ↓77.0%, p=0.0002
Higher Adherence to the Mediterranean Dietary Pattern Is Inversely Associated With Severity of COVID-19 and Related Symptoms: A Cross-Sectional Study
Details   Retrospective 250 COVID-19 patients in Iran, showing lower risk of severe disease with greater adherence to a Mediterranean diet.
May 27
PrEPPEP Galmés et al., Nutrients, doi:10.3390/nu14112254 Suboptimal Consumption of Relevant Immune System Micronutrients Is Associated with a Worse Impact of COVID-19 in Spanish Populations
Details   Ecological study in Spain, showing diets lower in vitamin D, A, B9, and zinc in regions with the highest COVID-19 incidence and mortality. Vitamin D intake was associated with lower prevalence, incidence, and a combined incidence+mortalit..
May 18
Late Bodolea et al., Nutrients, doi:10.3390/nu14102105 Nutritional Risk Assessment Scores Effectively Predict Mortality in Critically Ill Patients with Severe COVID-19
Details   Retrospective 90 severe COVID-19 ARDS patients in Romania, showing nutritional risk assessment scores PNI, CONUT, NUTRIC, and mNUTRIC to be independent predictors of mortality.
May 11
PrEPPEP Pimenta et al., European Journal of Preventive Cardiology, doi:10.1093/eurjpc/zwac056.304 Cardiovascular risk factor insights into the Tesco 1.0 Dataset
Details   Tesco grocery purchase retrospective, showing COVID-19 mortality correlated with myocardial infarction mortality risk factors. Salt, percentage of fat and oils, and total weight increased risk, while fiber was protective.
May 2
Review Kahleova et al., American Journal of Lifestyle Medicine, doi:10.1177/15598276221097621 (Review)
review
The Role of Nutrition in COVID-19: Taking a Lesson from the 1918 H1N1 Pandemic
Details   Review of evidence suggesting that a healthy diet reduces risk for COVID-19.
Apr 29
PrEPPEP Hou et al., Frontiers in Nutrition, doi:10.3389/fnut.2022.837458
severe case, ↓71.6%, p=0.23
COVID-19 Illness Severity in the Elderly in Relation to Vegetarian and Non-vegetarian Diets: A Single-Center Experience
Details   Retrospective 509 COVID-19 patients in Taiwan, showing higher risk of critical COVID-19 cases with non-vegetarian diets.
Mar 29
PrEPPEP Firoozi et al., International Journal of Clinical Practice, doi:10.1155/2022/5452488
cases, ↓65.0%, p<0.0001
The Association between Energy-Adjusted Dietary Inflammatory Index, Body Composition, and Anthropometric Indices in COVID-19-Infected Patients: A Case-Control Study in Shiraz, Iran
Details   Retrospective 133 COVID-19 patients and 322 controls, showing higher risk of COVID-19 for diets that have a higher inflammatory index (E-DII).
Jan 24
PrEPPEP Perez-Araluce et al., Frontiers in Nutrition, doi:10.3389/fnut.2021.805533
severe case, ↓77.9%, p=0.15
Components of the Mediterranean Diet and Risk of COVID-19
Details   Retrospective 5,194 participants in Spain with 382 COVID-19 cases, showing lower risk of COVID-19 with high adherence to a Mediterranean diet, with statistical significance only when excluding healthcare professionals.
Jan 14
PrEPPEP Jagielski et al., Nutrients, doi:10.3390/nu14020350
cases, ↓81.5%, p=0.005
Associations of Nutritional Behavior and Gut Microbiota with the Risk of COVID-19 in Healthy Young Adults in Poland
Details   Retrospective 95 people in Poland, showing significantly lower risk of COVID-19 with higher consumption of fruits, vegetables, and nuts. Diets with higher consumption of fruits, vegetables, and nuts had a significantly lower dietary infla..
Dec 30
2021
PrEPPEP Yamamoto et al., Scientific Reports, doi:10.1038/s41598-021-04350-0
cases, ↓66.3%, p=0.009
Flight attendant occupational nutrition and lifestyle factors associated with COVID-19 incidence
Details   Retrospective 84 flight attendants, 52 reporting COVID-19 status and diet quality, showing higher risk of COVID-19 with lower self-reported diet quality.
Dec 31
2021
PrEPPEP Magaña et al., Clinical Nutrition ESPEN, doi:10.1016/j.clnesp.2021.09.606
death, ↓53.0%, p=0.049
Influence of mediterranean diet on survival from covid-19 disease
Details   Retrospective 89 COVID-19 patients in Spain, showing lower mortality with adherence to the Mediterranean diet.
Sep 18
2021
PrEPPEP Nguyen et al., Nutrients, doi:10.3390/nu13093258
symp. case, ↓15.2%, p=0.006
Single and Combinative Impacts of Healthy Eating Behavior and Physical Activity on COVID-19-like Symptoms among Outpatients: A Multi-Hospital and Health Center Survey
Details   Analysis of 3,947 participants in Vietnam, showing significantly lower risk of COVID-19-like symptoms with physical activity and with a healthy diet. The combination of being physically active and eating healthy reduced risk further compa..
Aug 31
2021
PrEPPEP Ahmadi et al., Brain, Behavior, and Immunity, doi:10.1016/j.bbi.2021.04.022
death, ↑3.0%, p=0.85
Lifestyle risk factors and infectious disease mortality, including COVID-19, among middle aged and older adults: Evidence from a community-based cohort study in the United Kingdom
Details   Retrospective 468,569 adults in the UK, showing significantly lower COVID-19 mortality with physical activity.
Aug 23
2021
PrEPPEP Moludi et al., British Journal of Nutrition, doi:10.1017/S0007114521003214
cases, ↓91.6%, p<0.0001
The relationship between Dietary Inflammatory Index and disease severity and inflammatory status: a case–control study of COVID-19 patients
Details   Retrospective 60 COVID-19 hospitalized patients and 60 controls in Iran, showing pro-inflammatory diets associated with COVID-19 cases and severity. IR.KUMS.REC.1399·444, IR.TBZMED.REC.1399·225.
Jul 30
2021
PrEPPEP El Khoury et al., Frontiers in Nutrition, doi:10.3389/fnut.2021.707359 Inverse Association Between the Mediterranean Diet and COVID-19 Risk in Lebanon: A Case-Control Study
Details   Retrospective 399 people in Lebanon, showing a significant inverse association between the MedDiet score, corresponding to the level of adherence to the Mediterranean diet, and the risk of COVID-19.
Jul 9
2021
Early Rabail et al., Food Science & Nutrition, doi:10.1002/fsn3.2458 Nutritional and lifestyle changes required for minimizing the recovery period in home quarantined COVID-19 patients of Punjab, Pakistan
Details   Survey of 80 recovered COVID-19 patients in Pakistan, showing faster recovery with improved nutrition.
Jun 25
2021
PrEPPEP Merino et al., Gut, doi:10.1136/gutjnl-2021-325353 (preprint 6/25/2021)
severe case, ↓41.0%, p<0.0001
Diet quality and risk and severity of COVID-19: a prospective cohort study
Details   Retrospective 592,571 participants in the UK and USA with 31,815 COVID-19 cases, showing lower risk or COVID-19 cases and severity for higher healthful plant-based diet scores. Notably, the assocation was less evident with higher levels o..
Jun 7
2021
PrEPPEP Kim et al., BMJ Nutrition, Prevention & Health, doi:10.1136/bmjnph-2021-000272
m/s case, ↓72.0%, p=0.02
Plant-based diets, pescatarian diets and COVID-19 severity: a population-based case–control study in six countries
Details   Retrospective healthcare workers in six countries with exposure to COVID-19 patients, showing lower risk of moderate/severe COVID-19 with plant-based diets.
May 19
2021
PrEPPEP Ponzo et al., Nutrients, doi:10.3390/nu13051721 Mediterranean Diet and SARS-COV-2 Infection: Is There Any Association? A Proof-of-Concept Study
Details   Retrospective 1,206 healthcare professionals in Italy, showing the risk of COVID-19 infection inversely associated with adherence to the Mediterranean diet.
Apr 20
2021
PrEPPEP Naushin et al., eLife, doi:10.7554/eLife.66537
seropositive, ↓40.1%, p<0.0001
Insights from a Pan India Sero-Epidemiological survey (Phenome-India Cohort) for SARS-CoV2
Details   Retrospective 10,427 volunteers in India, 1,058 anti-nucleocapsid antibody positive, showing lower risk of seropositivity with a vegetarian diet.
Mar 5
2021
PrEPPEP Greene et al., Frontiers in Nutrition, doi:10.3389/fnut.2021.591964 Negative Association Between Mediterranean Diet Adherence and COVID-19 Cases and Related Deaths in Spain and 23 OECD Countries: An Ecological Study
Details   Analysis of 17 regions in Spain, showing an inverse association between adherence to the Mediterranean diet and COVID-19 cases and mortality.
Feb 15
2021
PrEPPEP Mahto et al., American Journal of Blood Research, 11:1
IgG+, ↓20.4%, p=0.32
Seroprevalence of IgG against SARS-CoV-2 and its determinants among healthcare workers of a COVID-19 dedicated hospital of India
Details   Retrospective 689 healthcare workers in India, showing non-statistically significant lower risk of IgG positivity with a vegetarian diet in unadjusted results.
Sep 8
2020
PrEPPEP Galmés et al., Nutrients, doi:10.3390/nu12092738 Current State of Evidence: Influence of Nutritional and Nutrigenetic Factors on Immunity in the COVID-19 Pandemic Framework
Details   Ecological study of European countries analyzing 10 vitamins and minerals endorsed by the European Food Safety Authority as having sufficient evidence for a causal relationship between intake and optimal immune system function: vitamins D..
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