California's system of labelling food additives and chemicals is flawed and inconsistent with state law, the world's largest food manufacturers association claimed on Friday 12 June. The Grocery Manufacturers of America (GMA), which representscompanies with combined food and drink sales of over USD430bn, warned environmental officials that the system could undermine consumer confidence if left unchanged. California's Office of Environmental Health Hazard Assessment (OEHHA) uses an approved list of scientific organisations, designated as 'authoritative bodies', to test and oversee listing of chemicals added to foods.