Two natural tannins, oligomeric proanthocyanidins and punicalagin, acted as potent inhibitors against SARS-CoV-2 infection, and grape seed extract supplementation could serve as a healthy food for infection prevention.

A structural and biochemical study reveals the molecular mechanism of the predator–prey associations of Aplysia kurodai and brown algae (akuBGL–phlorotannin/laminarin–EHEP system), which has high-potential applications in the biotechnology industry.