The Effects of a Sublingual Sprayable Microemulsion of Vitamin D on Inflammatory Markers in COVID-19 Patients

This placebo-controlled five-day study will be performed on 100 hospitalized COVID-19 patients with vitamin D insufficiency randomized into two groups.

The aim of this study is to investigate the impact of the high dose vitamin D supplementation on laboratory markers of systemic inflammation such as CRP, ferritin and IL-6 in hospitalized patients with COVID-19. The blood samples are analyzed at the Joint Laboratory of the Pauls Stradins Clinical Univesity Hospital. Patients with confirmed SARS-CoV2 infection (PCR) will be randomly divided into two groups: the intervention group receives vitamin D in the form of a sublingual sprayable microemulsion (LYL love your life® sunD3 LYLmicro™) of 4,000 IU three times daily after breakfast, lunch and dinner; the control group receives the same regimen of placebo spray.

A total of 100 inpatients will be selected for the study. All patients will receive standard care for COVID-19 and existing comorbidities (diabetes, arterial hypertension, etc) according to hospital-approved protocol. The primary outcome is defined as the change in the level of the inflammatory marker and the disease's severity.

Population. Disease severity is defined by the blood oxygen saturation level. Mild clinical manifestation is characterized by SpO2≥94%, moderate 90%≤SpO2<94% and severe - SpO2<90%. Age, BMI, GFR, vitamin D and COVID-19 severity are considered as randomization parameters.

Inclusion criteria

• Male or female subjects aged 18 and over
• Vitamin D level below 30 ng/ml
• Positive SARS-CoV-2 test

Exclusion criteria

• Patients with mental health problems,
• eGFR ≤30 ml/min,
• Vitamin D level ≥ 30 ng/ml,
• Pregnant women
• Any other illness or condition that the researcher deemed may interfere with the results
• Patients who refuse the studies