From the story here:
... low micromolar (µM) concentrations of sulforaphane (2.4–31 µM) lowered virus replication by 50 percent among six distinct strains of SARS-CoV-2 — including the Delta and Omicron variants. Researchers discovered similar results among cells previously infected with the viruses. In these cases, the protective effects of sulforaphane were apparent even in reference to already established virus infections.
