Researchers tested a lion’s mane mushroom extract for its ability to stop harmful bacteria from forming protective biofilms that make infections harder to treat. The extract showed strong activity against Proteus mirabilis bacteria, reducing biofilm formation by over 78%. The antibiofilm power comes mainly from two phenolic compounds: protocatechuic acid and p-coumaric acid. These findings suggest lion’s mane mushroom could be developed into natural supplements or food preservatives to prevent bacterial contamination.