Breast Cancer and Prostate Cancer Mushrooms are extremely efficient in protecting against breast and prostate disease because of the considerable existence of different polysaccharides, similar to Beta-Glucans and conjugated Linoleic Acid that both have anti-carcinogenic results. Reduce the Threat of Cancer Mushrooms include pretty much as high an antioxidant (cancer prevention agent) capability as tomatoes, carrots, pumpkins, green beans, red peppers and zucchini.