Oral zinc sulphate reduces the recurrence rate and provides significant therapeutic effects for viral warts: A systematic review and meta-analysis of randomized controlled trials

Chen-Chi Wang, Wei-Xiang Wang and Po-Yuan Wu

PLOS ONE, 2025, vol. 20, issue 5, 1-15

Abstract: Zinc plays a crucial role in maintaining immune balance in the human body. Zinc is believed to substantially affect cytokine synthesis and signaling; thus potentially combating viral infections, including Human Papillomavirus infection, through various mechanisms. Several randomized controlled trials (RCTs) have investigated whether oral zinc sulphate can improve viral warts; however, no comprehensive data is currently available. Therefore, we conducted a meta-analysis to evaluate the effectiveness of oral zinc sulphate for the treatment of viral warts. On July 1, 2024, we performed an extensive database search on PubMed, Embase, Web of Science, Cochrane CENTRAL, and ClinicalTrials.gov. Initially, 952 studies were identified, and after screening, 7 studies were included in the final analysis. Our findings showed that the total clearance rate of warts was significantly higher in the oral zinc sulphate group than in the control group (risk difference = 0.288; 95% CI = 0.087–0.489; p = 0.005). Subgroup analysis revealed that this therapeutic effect was more pronounced in individuals with low initial plasma zinc levels (risk difference = 0.767; 95% CI = 0.649–0.885; p

Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:plo:pone00:0323051

DOI: 10.1371/journal.pone.0323051

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