GIP and type 1 diabetes mellitus: Infusion of GIP in healthy and T1DM patients reduced CTX-I but not P1NP, and these effects of GIP on bone were inhibited by selective GIPR antagonists (Nissen et al., 2014; Westberg-Rasmussen et al., 2017; Christensen et al., 2018; Skov-Jeppesen et al., 2019).