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Yamei Kin, Chinese physician and pioneer of tofu (soy bean curd) in the USA during World War I. Kin was a graduate of the Woman's Medical College, New York, USA, and worked as a doctor in China. During World War I she worked closely with the USDA (US Department of Agriculture), conducting experiments to see if tofu could help overcome meat shortages. Between 1916 and 1918 she established both a production plant and restaurant for tofu, in New York City. She also popularised the eating of tofu, being interviewed by the New York Times Magazine in 1917. Tofu is a rich source of dietary protein, often used as an alternative to meat. (KEYSTONE/SCIENCE PHOTO LIBRARY/LIBRARY OF CONGRESS/SCIENCE PHOTO LIBRARY)