Dr. Lieberman: When I first started working in this field in the late 1970’s, I thought every patient had yeast, and I treated everybody accordingly. After awhile I got disillusioned and I said, “No, this is impossible, nobody has it!” As the years went by, the pendulum swung back again. If you’re an astute clinician and you talk to patients, you see that yeast is a problem. The paper presented by Dr. William Shaw at one of the American Academy of Environmental Medicine conferences in Kansas City was the real bombshell, because it gave us, for the first time, really hard evidence that many physicians were right who talked about yeast as a major cause of impairments.