Betulinic acid, a major component of aqueous extracts from Inonotus obliquus grown on birch trees, exerted cytotoxic activity against primary tumour cells cultured from patients in 4 of 4 medulloblastoma-tumour samples and in 20 of 24 glioblastoma-tumour samples with induction of apoptosis, while being non-toxic against mouse nerve cells1-3. Maitake D-fraction in combination with Maitake (Grifola frondosa) fruiting body was reported by Nanba to produce tumour regression or significant symptom improvement in 37% of brain cancer patients4. 1. Betulinic acid: a new cytotoxic agent against malignant braintumour cells. Fulda S, Jeremias I, Steiner H.H, Pietsch T, Debatin K.M. Int J Cancer. 1999;82(3):435-41
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of betulinic acid for the prevention and treatment of cancer and
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effects. Mullauer F.B, Kessler J.H, Medema J.P. Anticancer
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Nanba H. J Orthomolecular Med. 1997;12:43-49