The Effect of Melatonin and Vitamin C on COVID-19
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The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. |
ClinicalTrials.gov Identifier: NCT04530539 |
Recruitment Status :
Completed
First Posted : August 28, 2020
Last Update Posted : August 17, 2022
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Condition or disease | Intervention/treatment | Phase |
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Covid19 SARS-CoV Infection | Dietary Supplement: Vitamin C Dietary Supplement: melatonin Dietary Supplement: Placebo Other: Symptom Survey | Not Applicable |
Study Type : | Interventional (Clinical Trial) |
Actual Enrollment : | 122 participants |
Allocation: | Randomized |
Intervention Model: | Parallel Assignment |
Masking: | Triple (Participant, Care Provider, Investigator) |
Primary Purpose: | Supportive Care |
Official Title: | The Effect of Melatonin and Vitamin C on COVID-19 |
Actual Study Start Date : | October 5, 2020 |
Actual Primary Completion Date : | August 11, 2022 |
Actual Study Completion Date : | August 11, 2022 |

Arm | Intervention/treatment |
---|---|
Experimental: Experimental- Melatonin
Patients will receive melatonin
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Dietary Supplement: melatonin
10mg melatonin, at bedtime Other: Symptom Survey Daily symptom survey to be completed by patient electronically |
Experimental: Experimental- Vit C
Patients will receive vitamin C
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Dietary Supplement: Vitamin C
1000mg Vitamin C, at bedtime
Other Name: ascorbic acid Other: Symptom Survey Daily symptom survey to be completed by patient electronically |
Placebo Comparator: Control
Patients will receive placebo
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Dietary Supplement: Placebo
Placebo at bedtime Other: Symptom Survey Daily symptom survey to be completed by patient electronically |
- Symptom Severity [ Time Frame: 14 days ]Symptom severity will be tracked electronically
- Symptom progression [ Time Frame: 14 days ]Determine symptom course of those with moderate or severe symptoms

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.
Ages Eligible for Study: | 50 Years and older (Adult, Older Adult) |
Sexes Eligible for Study: | All |
Accepts Healthy Volunteers: | Yes |
Inclusion Criteria
- COVID-19 positive test (outpatient testing),
- Age >50 (chosen based greater risk for older patients to be vitamin deficient, age >65 not used so as not to be too restrictive in the inclusion criteria)
- Experiencing symptoms for <5 days prior to enrollment
- Able to read and write in English or Spanish
- Able to access REDCap daily
- Valid email address
- Current has a Lancaster General Health primary care physician
Exclusion Criteria
- COVID-19 test ordered pre-procedure for asymptomatic screening
- Currently taking vitamin C supplements
- Currently taking melatonin supplements
- Currently hospitalized
- Deceased
- Currently pregnant
- Currently incarcerated

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT04530539
United States, Pennsylvania | |
Lancaster General Health | |
Lancaster, Pennsylvania, United States, 17602 |
Principal Investigator: | Corey Fogleman | Penn Medicine Lancaster General Health | |
Principal Investigator: | Corey Fogleman, MD | Physician |
Responsible Party: | Lancaster General Hospital |
ClinicalTrials.gov Identifier: | NCT04530539 |
Other Study ID Numbers: |
2020-68 |
First Posted: | August 28, 2020 Key Record Dates |
Last Update Posted: | August 17, 2022 |
Last Verified: | August 2022 |
Individual Participant Data (IPD) Sharing Statement: | |
Plan to Share IPD: | No |
Studies a U.S. FDA-regulated Drug Product: | No |
Studies a U.S. FDA-regulated Device Product: | No |
vitamin c melatonin |
COVID-19 Severe Acute Respiratory Syndrome Pneumonia, Viral Pneumonia Respiratory Tract Infections Infections Virus Diseases Coronavirus Infections Coronaviridae Infections Nidovirales Infections RNA Virus Infections |
Lung Diseases Respiratory Tract Diseases Ascorbic Acid Melatonin Vitamins Micronutrients Physiological Effects of Drugs Antioxidants Molecular Mechanisms of Pharmacological Action Protective Agents Central Nervous System Depressants |