A tiny bean which is usually used to feed cows in Australia can lower the risk of heart disease in humans, Australian researchers said on Tuesday. Over 85 percent of the world’s lupin crops are grown in Australian soil, and a team of researchers from the University of Western Australia said the bean is packed with protein and fibre, and is low in carbohydrates. The researchers ground the bean down, made flour that was 40 percent lupin, and baked bread, pasta and biscuits from the product.