The objective of this study was to evaluate anti-inflammatory and antimicrobial activities of neovestitol and vestitol isolated from Brazilian red propolis (BRP).

BRP ethanolic extract (EEP), neovestitol, and vestitol were evaluated by anti-inflammatory properties using a neutrophil migration assay. The antimicrobial activity was evaluated by minimal inhibitory and bactericidal concentrations (MIC and MBC) against Streptococcus mutans, Streptococcus sobrinus, Staphylococcus aureus, and Actinomyces naeslundii. Neovestitol, vestitol, and EEP inhibited neutrophil migration at a dose of 10 mg/kg. Regarding antimicrobial activity, neovestitol showed MICs ranging from < 6.25 to 25–50 μg/mL and MBCs ranging from 25–50 to 50–100 μg/mL, while vestitol showed MICs ranging from 25–50 to 50–100 μg/mL and MBCs ranging from 25–50 to 50–100 μg/mL.

Both isoflavonoids neovestitol and vestitol are consistent bioactive compounds displaying anti-inflammatory and antimicrobial activities that can strongly act in a low dose and concentration and have a promising potential to be applied in the pharmaceutical and food industries.