Extracts from Phellinus linteus (Mesima, Meshimakobu, Song-gen, Sang-hwang)
have been used for centuries in traditional Korean medicine.

A paper published by Harvard Medical School, reported that Phellinus linteus is a promising anti-cancer agent. However the paper states more research is needed to understand the mechanisms behind Phellinus linteus.
In vitro research published by the British Journal of Cancer, demonstrated one anti-cancer mechanism behind Phellinus linteus. It was found that the mushroom inhibited the growth of breast cancer cells by way of inhibiting the enzyme AKT, as well as inhibiting angiogenesis.