Lentinan has been isolated and used to treat stomach and other cancers due to its antitumor
properties, but has also been found to protect your liver,16 relieve other stomach ailments (hyperacidity, gallstones, ulcers), anemia, ascites, and pleural effusion.
One of the more remarkable scientific studies demonstrating shiitake's antitumor effect was a Japanese animal study,17 where mice suffering from sarcoma were given shiitake extract.