Scientists developed a new type of Shiitake mushroom by growing it on a special substrate enriched with Astragalus root. This novel mushroom contains significantly more beneficial polysaccharides than regular Shiitake. When tested against colorectal cancer cells, extracts from this mushroom showed strong cancer-fighting properties, with the ultrasound extraction method being most effective. This research suggests Astragalus Shiitake could become a powerful functional food for cancer prevention and treatment.