These links refer to and discuss the Minnesota Starvation Study. This landmark study was done during the 1940s. A group of adult men were semi-starved over a 3 month period. They were observed during an additional 3 month refeeding period and over the continuing 6 months. Many of these men began acting like they had anorexia. This study showed that many of the symptoms that we typically associate with anorexia are actually the symptoms of malnourishment. These men suffered psychological effects of malnourishment that lasted up to 7 months and even longer.