I first became interested in this topic because of improvements that were noted in autistic children by the researcher Susan Owens. It was Owens who collected the data showing that many autistic children had frequent urination of small volume and found that the phenomenon was associated with oxalates. She also found that these children often manifested gastro-intestinal symptoms such as diarrhea and stomach pain. They may also have pain in the urinary tract. That pain is relieved when a low oxalate diet is instituted. Owens also found that children had improved cognitive, academic and motor skills once the amount of oxalates in their diets was sharply reduced. The same dietary measures helped reduce pain in their muscles and feet, and also brought about a reduction in abnormal behavior and self-abuse as well.