GCG and short bowel syndrome: GLP‐2 administration increases superior mesenteric artery blood flow (supplying the duodenum, jejunum, ileum, and a part of the proximal colon) in healthy humans (Bremholm et al., 2009, 2010), patients with short bowel syndrome (Bremholm et al., 2011; Høyerup et al., 2013), calves (Taylor‐Edwards et al., 2011), anesthetized rats (Deniz et al., 2007), and piglets on total parenteral nutrition (Guan et al., 2006; Stephens et al., 2006).