The following is a list of research papers exploring the role of natural health products (NHPs) in the prevention, management or treatment of COVID and/or vaccine-related topics during the 2020-2022 pandemic:

Benskin L.L. A Basic Review of the Preliminary Evidence that COVID-19 Risk and Severity is Increased in Vitamin D Deficiency. 2020.

Subedi L, Tchen S, Gaire B.P, Hu B, Hu K. Adjunctive Nutraceutical Therapies for COVID-19. International Journal of Molecular Sciences, 2021.

James P.T, Ali Z, Armitage A.E, Bonell A, Cerami C, Drakesmith H, Jobe M, Jones K.S, Liew Z, Moore S.E, Morales-Berstein F, Nabwera H.M, Nadjm B, Pasricha S-R, Scheelbeek P, Silver M.J, Teh M.R, Prentice A.M. Could nutrition modulate COVID-19 susceptibility and severity of disease? A systematic review. The Journal of Nutrition, 2020.

Cavezzi A, Troiani E, Corrao S. COVID-19: hemoglobin, iron, and hypoxia beyond inflammation. A narrative review. Clinics and Practice, 2020.

Samad N, Dutta S, Sodunke T.E, Fairuz A, Sapkota A, Miftah Z.F, Jahan I, Sharma P, Abubakar A.R, Rowaiye A.B, Oli A.N, Charan J, Islam S, Haque M. Fat-Soluble Vitamins and the Current Global Pandemic of COVID-19: Evidence-Based Efficacy from Literature Review. Journal of Inflammation Research, 2021.

Castle R.D, Williams M.A, Bushell W.C, Rindfleisch J.A, Peterson C.T, Marzolf J, Brouwer K, Mills P.J. Implications for Systemic Approaches to COVID-19: Effect Sizes of Remdesivir, Tocilizumab, Melatonin, Vitamin D3, and Meditation. Journal of Inflammation Research, 2021.

Espinola M.S.B, Bertelli M, Bizzarri M, Unfer V, Lagana A.S, Visconti B, Aragona C. Inositol and vitamin D may naturally protect human reproduction and women undergoing assisted reproduction from Covid-19 risk. Journal of Reproductive Immunology, 2021.

Ratiani L, Gabunia L, Khetsuriani S, Gamkrelidze N, Gumbaridze L, Varazi E. Interplay of Different Parameters in COVID‐19 Infection and Novel Results of Possible Prevention and Treatment (Review of the Literature). International Journal of Progressive Sciences and Technologies (IJPSAT), 2021.

Shchetinin E, Baturin V, Arushanyan E, Bolatchiev A, Bobryshev D. Potential and Possible Therapeutic Effects of Melatonin on SARS-CoV-2 Infection. Antioxidants, 2022.

Inchingolo A.D, Inchingolo A.M, Bordea I.R, Malcangi G, Xhajanka E, Scarano A, Lorusso F, Farronato M, Tartaglia G.M, Isacco C.G, Marinelli G, D’Oria M.T, Hazballa D, Santacroce L, Ballini A, Contaldo M, Inchingolo F, Dipalma G. SARS-CoV-2 Disease Adjuvant Therapies and Supplements Breakthrough for the Infection Prevention. Microorganisms, 2021.

Miranda-Massari J.R, Toro A.P, Loh D, Rodriguez J.R, Borges R.M, Marcial-Vega V, Olalde J, Berdiel M.J, Riordan N.H, Martinez J.M, Gil A, Gonzalez M.J. The Effects of Vitamin C on the Multiple Pathophysiological Stages of COVID-19. Life, 2021.

Cárdenas-Rodríguez N, Bandala C, Vanoye-Carlo A, Ignacio-Mejía I, Gómez-Manzo S, Hernández-Cruz E.Y, Pedraza-Chaverri J, Carmona-Aparicio L, Hernández-Ochoa B. Use of Antioxidants for the Neuro-Therapeutic Management of COVID-19. Antioxidants, 2021.

Alhazmi H.A, Najmi A, Javed S.A, Sultana S, Al Bratty M, Makeen H.A, Meraya A.M, Ahsan W, Mohan S, Taha M.M.E, Khalid A. Medicinal Plants and Isolated Molecules Demonstrating Immunomodulation Activity as Potential Alternative Therapies for Viral Diseases Including COVID-19. Frontiers in Immunology. 2021.

Beltrán-García J, Osca-Verdegal R, Pallardó F.V, Ferreres J, Rodríguez M, Mulet S, Sanchis-Gomar F, Carbonell N, García-Giménez J.L. Oxidative Stress and Inflammation in COVID-19-Associated Sepsis: The Potential Role of Anti-Oxidant Therapy in Avoiding Disease Progression. Antioxidants. 2020.

Qazi A.S, Akhtar N, Khalil A.A.K, Ahmed M.S, Mumtaz S. A Possible Role of Medicinal Plants in finding a Cure for Covid-19. Life & Science. 2020.

Naser M, Mohamed MN, Shehata L.H. Advanced Strategies Against COVID‑19 Review. International Journal of Progressive Sciences and Technologies (IJPSAT). 2021.

Bousquet J, Anto J.M, Czarlewski W, Haahtela T, Fonseca S.C, Iaccarino G, Blain H, Vidal A, Sheikh A, Akdis CA, Zuberbier T, ARIA group. Cabbage and fermented vegetables: from death rate heterogeneity in countries to candidates for mitigation strategies of severe COVID-19. Allergy. 2021.

Silveira D, Prieto-Garcia J.M, Boylan F, Estrada O, Fonseca-Bazzo Y.M, Jamal C.M, Magalhães P.O, Pereira E.O, Tomczyk M, Heinrich M. COVID-19: Is There Evidence for the Use of Herbal Medicines as Adjuvant Symptomatic Therapy? Frontiers in Pharmacology. 2020.