Somatostatin-28 (sheep, human rat mouse) is a biologically active polypeptide, synthesised in the proximal intestinal epithelial cells. Somatostatin-28 (sheep, human rat mouse) suppresses glucose-stimulated insulin secretion without affecting circulating basal insulin concentration. Somatostatin-28 (sheep, human rat mouse) also targets to somatostatin receptor subtype 5 (SSTR5) to regulate GLP-1 secretion.

Adynerin is a natural steroid found in the herbs of Nerium oleander.

[D-Arg2]Dermorphin-(1-4) amide is a N-terminal shorter peptide amide of [D-Arg2]dermorphin with the hypothermic effect.[D-Arg2]Dermorphin-(1-4) amide shows analgesic activity and degradation in soluble mouse liver and brain extracts.