Consumers are being sold food including mozzarella that is less than half real cheese, ham on pizzas that is either poultry or meat emulsion", and frozen prawns that are 50% water, according to tests by a public laboratory. The checks on hundreds of food samples, which were taken in West Yorkshire, revealed that more than a third were not what they claimed to be, or were mislabelled in some way. Testers also discovered beef mince adulterated with pork or poultry, and even a herbal slimming tea that was neither herb nor tea but glucose powder laced with a withdrawn prescription drug for obesity at 13 times the normal dose. A third of fruit juices sampled were not what they claimed or had labelling errors. Two contained additives that are not permitted in the EU, including brominated vegetable oil, which is designed for use in flame retardants and linked to behavioural problems in rats at high doses. Experts said they fear the alarming findings from 38% of 900 sample tests by West Yorkshire councils were representative of the picture nationally, with the public at increasing risk as budgets to detect fake or mislabelled foods plummet. In one case, tests revealed that the "vodka" had been made not from alcohol derived from agricultural produce, as required, but from isopropanol, used in antifreeze and as an industrial solvent. Many of the samples were collected from fast-food restaurants, independent retailers and wholesalers; some were from larger stores and manufacturers.