This study used computer modeling to investigate whether Chaga mushroom components can bind to and potentially block the coronavirus spike protein that SARS-CoV-2 uses to infect cells. The researchers found that three active compounds in Chaga—beta glycan, betulinic acid, and galactomannan—attached strongly to the virus’s binding sites in ways similar to known antiviral molecules. Beyond blocking viral entry, Chaga also has immune-boosting and anti-inflammatory properties that could help prevent the dangerous cytokine storm associated with severe COVID-19.