High in biologically active compounds, mushrooms contain substances that are antimicrobial, antiviral, antitumor, antiallergic, immunomodulating, anti-inflammatory, antiatherogenic, hypoglycemic, and hepatoprotective. Mushrooms may also help prevent cancer and cardiovascular disease by decreasing DNA damage, reducing carcinogen concentrations and their activation, inhibiting the growth of cancer cells by scavenging free radicals, and stimulating the immune system.