Worldwide demand for soybeans has more than doubled their price in the last five years due to increasing demand from China, Southeast Asia, and for use in biofuels and GM-free soybeans. Soybeans are legumes native to East Asia that are an important protein source and can produce more protein per land area than other crops. Whole soybeans are an excellent source of protein and fiber, with soy protein being a complete protein that research has shown can lower LDL cholesterol levels. The top soybean producers are the United States, Brazil, Argentina, and China, with Brazil expected to surpass the US in the near future.