Nisin for COVID-19

 Nisin has been reported as potentially beneficial for COVID-19 in the following studies.
COVID-19 involves the interplay of 350+ viral and host proteins and factors providing many therapeutic targets. Scientists have proposed 10,000+ potential treatments. c19early.org analyzes 200+ treatments. We have not reviewed nisin in detail.
English et al., The antimicrobial peptide nisin promotes host cell survival during SARS-CoV-2 infection, Virology Journal, doi:10.1186/s12985-025-02921-5
Abstract COVID-19 has been a major public health concern for the past five years. While remarkable work has been done to develop therapies, there is still a need for more treatments to fight this disease. Recently, it was suggested that nisin, an FDA-approved antimicrobial compound, may interfere with SARS-CoV-2 entry into host cells. Here, we show that nisin does not inhibit SARS-CoV-2 replication in vitro. Surprisingly, nisin treatment leads to reduced host-cell death during infection in a dose-dependent manner, suggesting that nisin may mitigate SARS-CoV-2-induced pathology.