Effective Jan. 1, 2006, all food companies, including dietary and nutritional supplement manufacturers, must include warnings if they contain "major allergens." For article, click here. The new requirements are part of the 2004 Food Allergen Labeling and Consumer Protection Act. The Act covers major food allergens including milk, egg, fish, shellfish, tree nuts, wheat, peanuts, and soybeans, and proteins derived from these foods.