Excerpted from The Yeast Connection, by Dr. William Crook.

In August 1982, Wesley, a two-and-a-half-year-old boy, was referred to me for an evaluation because of severe nervous symptoms, including temper tantrums and hyperactivity. In reviewing his history, I learned that he had suffered repeated ear problems, which were treated with antibiotics. During one two-month period, he was given antibiotics every day in an effort to "suppress" the ear infections.

At age two, because of his temper tantrums and other severe nervous system symptoms, Wesley's pediatrician referred him to a clinical psychologist who advised behavior modification. Yet, it didn't work and the behavior problems continued. So did the bouts of ear infections.

Because of these symptoms, and the history of multiple courses of antibiotics, I prescribed oral nystatin powder and a sugar-free, corn-free diet. In one month, Wesley was "like a different child"; yet, when challenged with sugar and junk food, the hyperactivity and irritability returned.

Wesley continued the diet and nystatin on a regular basis for two years. Then he was able to relax a bit on the diet. Major infractions, however, would always cause problems.

In the Fall of 1995, I called Wesley's mother to find out how he was getting along. She told me he was 16 years old, ate wholesome foods, and took vitamins, magnesium and occasional nystatin. She said, "He never had to take Ritalin or other drugs. He's doing well in self-esteem and in his school work."

Update April 2000: In April 2000, Wesley's mother called me and said, "He has been a wonderful son. He never had to take Ritalin or related drugs. He graduated from high school and has had a responsible job for the past three years. He will be married on April 15th."