SynthesisDiabetes & metabolic syndrome
Vitamin C and COVID-19 treatment: A systematic review and meta-analysis of randomized controlled trials.
Synthesis in Diabetes & metabolic syndrome. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 46 papers, 9 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
46 citing papers in PubMed, 9 syntheses or guidelines pooled it, 82 citations in OpenAlex.
- Efficacy of vitamin C in COVID-19 management: a systematic review and meta-analysis.BMC infectious diseases · 2025Pooled it
- Pooled it
- The effect of macronutrient and micronutrient supplements on COVID-19: an umbrella review.Journal of health, population, and nutrition · 2024Pooled it
- Association of Oral or Intravenous Vitamin C Supplementation with Mortality: A Systematic Review and Meta-Analysis.Nutrients · 2023Pooled it
- Attitudes and beliefs regarding the use of herbs and supplementary medications with COVID-19: A systematic review.Research in social & administrative pharmacy : RSAP · 2023Pooled it
- Vitamin C Supplementation for the Treatment of COVID-19: A Systematic Review and Meta-Analysis.Nutrients · 2022Pooled it
- Janus kinase inhibitors for the treatment of COVID-19.The Cochrane database of systematic reviews · 2022Pooled it
- Clinical significance of micronutrient supplements in patients with coronavirus disease 2019: A comprehensive systematic review and meta-analysis.Clinical nutrition ESPEN · 2022Pooled it
- Effect of Vitamin C on Clinical Outcomes of Critically Ill Patients With COVID-19: An Observational Study and Subsequent Meta-Analysis.Frontiers in medicine · 2022Pooled it
- Humulus lupus extract rich in xanthohumol improves the clinical course in critically ill COVID-19 patients.Biomedicine & pharmacotherapy = Biomedecine & pharmacotherapie · 2023Trial
- Vitamin C for the management of COVID-19: a systematic review and meta-analysis of randomized controlled trials.Annals of medicine and surgery (2012) · 2026Article
- The Effect of a Lecture-Based Educational Intervention to Improve the Nutrition Knowledge and Behavior of Plant-Based Seventh-Day Adventists Living in the United Kingdom.Health science reports · 2025Article
- The Role of Vitamins, Magnesium, and Trace Elements in COVID-19 Treatment and Post-COVID-19 Rehabilitation: An Updated Overview.Current medicinal chemistry · 2025Review
- Prescription rates in different groups of outpatients with covid-19 and other acute respiratory infections: comparative observational study based on German routine data.BMJ medicine · 2025Article
- Assessment of Supplementation with Different Biomolecules in the Prevention and Treatment of COVID-19.Nutrients · 2024Review
- COVID-19 and Comorbidities: What Has Been Unveiled by Metabolomics?Metabolites · 2024Review
- Global landscape of COVID-19 research: a visualization analysis of randomized clinical trials.Clinical and experimental medicine · 2024Article
- Association of vitamin B12, folate, and homocysteine with COVID-19 severity and mortality: A systematic review and meta-analysis.SAGE open medicine · 2024Review
- Potent Antiviral Activity of Vitamin B12 against Severe Acute Respiratory Syndrome Coronavirus 2, Middle East Respiratory Syndrome Coronavirus, and Human Coronavirus 229E.Microorganisms · 2023Article
- Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
6 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
BACKGROUND AND
aimsVitamin C has been used as an anti-oxidant in various diseases including viral illnesses like coronavirus disease (COVID-19).
methodsMeta-analysis of randomized controlled trials (RCT) investigating the role of vitamin C supplementation in COVID-19 was carried out.
resultsTotal 6 RCTs including n = 572 patients were included. Vitamin C treatment didn't reduce mortality (RR 0.73, 95% CI 0.42 to 1.27; I
conclusionNo significant benefit noted with vitamin C administration in COVID-19. Well-designed RCTs with standardized control group needed on this aspect.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.