Scientific research on our D3FENSE immune booster's Ingredients
Vitamin D
Vitamin D protects against colds and flu, finds major global study February 16, 2017
Vitamin D can protect against colds, flu: study claims
Exploring the Links Between Coronavirus and Vitamin D June 10, 2020
 Association of Vitamin D Deficiency and Treatment with COVID-19 Incidence
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Vitamin C
The Antiviral Properties of Vitamin C
Vitamin C for Preventing and Treating the Common Cold
Effect of Vitamin C Infusion on Organ Failure and Biomarkers of Inflammation and Vascular Injury in Patients With Sepsis and Severe Acute Respiratory Failure: The CITRIS-ALI Randomized Clinical Trial
Lessening Organ Dysfunction With Vitamin C - COVID-19 - Full Text View
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Selenium
Selenium supplementation in the prevention of coronavirus infections (COVID-19)
 Selenium, Systemic Immune Response Syndrome, Sepsis, and Outcome in Critically Ill Patients
 Link identified between dietary selenium and outcome of COVID-19 disease
 Association between regional selenium status and reported outcome of COVID-19 cases in China
Host Nutritional Status and Its Effect on a Viral Pathogen
ÂZinc
Z inc for the common cold—not if, but when
Reduction in Duration of Common Colds by Zinc Gluconate Lozenges in a Double-Blind Study
The Effectiveness of High Dose Zinc Acetate Lozenges on Various Common Cold Symptoms: A Meta-Analysis
The common cold in adults: Treatment and preventionÂ
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