In addition to satiety, CCK has been shown to be involved in learning and memory, nociception, reward, and anxiety-related behaviors (Daugé and Léna, 1998; Crespi et al., 2000; Hadjiivanova et al., 2003; Rotzinger and Vaccarino, 2003; Keppel Hesselink, 2020). Here, CCK is linked to Anxiety.