Liu received his Ph.D. in Toxicology from Cornell University in 1993. He also holds a M.D. in Medicine and a M.S. in Nutrition and Food Toxicology. Dr. Liu's research program focuses on diet and cancer, effect of functional foods/nutraceuticals on chronic disease risks, and bioactive agents in herbal remedies for cancer and hepatitis. Dr. Liu has published more than 50 original scientific papers in peer-reviewed journals. He has been directly interviewed by more than 90 news media and scientific organizations about his research including the Associated Press, Reuters, ABC, CNN, CBS, the BBC, the New York Times, the Washington Post, Time Magazine, Science News, AAAS, ACS, AICR, and Reader's Digest.