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Scottish whisky is a truly iconic product, with Scotland the largest-producing nation of whisky worldwide. Production has increased by 30 percent in the last decade and more than five times in the last half-century. In 2011 more than 500 million litres of pure alcohol (lpa) of whisky were produced in the UK. As the whisky industry prospers, more attention is drawn to the by-products of whisky production. Whisky manufacture yields considerable amounts of by-products – which include liquid and solid components – alongside the main product. These materials contain significant amounts of proteins that are currently underutilised and are often perceived as a challenge rather than an opportunity for distillers.