Chaga tea extract (Inonotus obliquus) was found to have impactful cancer-fighting abilities - cutting cancer cell growth by 50% at just 0.5 mg/mL. The extract's key compounds work in multiple ways, stopping cancer cells from multiplying while blocking their growth engines. Adding just 0.25 mg/mL of chaga to standard cancer drugs made treatments up to twice as effective. Testing in two of the hardest-to-treat types of breast cancer cells showed the extract could boost both targeted therapy and chemotherapy.