Samuel Gee starched foods should be avoided. He forbids rice, sago, fruit and vegetables. Raw meat is recommended as are thin slices of toasted bread. Gee highlights particular success with a child "who was fed upon a quart of the best Dutch mussels daily". However, the child cannot bear this diet for more than one season. The cause of coeliac disease was eventually discovered to be an autoimmune reaction to gliadin, a gluten protein found in wheat, plus Secalin in rye and Hordien in barley. The lining of the small bowel is flattened, which interferes with the absorption of nutrients. Gee would
Gluten-free diet Manufacturing Practices and allergen control measures adopted are not sufficient to prevent the presence of accidental trace amounts. When a product contains the warning of cross-contamination with wheat, rye, barley, oats and their hybridised strains, the warning "contains gluten" is mandatory. The law does not establish a gluten threshold for the declaration of its absence. Health Canada considers that foods containing levels of gluten not exceeding 20 ppm as a result of contamination, meet the health and safety intent of section B.24.018 of the Food and Drug Regulations when a gluten-free claim is made. Any intentionally added gluten, even at