The joining of two or more amino acid monomers via amide bonds forms peptides. The size of a peptide is what separates it from a protein. Peptides are defined as compounds that include no more than 50 amino acids. Peptides work by attaching to particular cell surface receptors, acting as mimics of receptor ligands, and assisting on the cell membrane to treat disorders. The last ten years have seen a resurgence in interest and scientific momentum in the field of peptide drug discovery as peptide therapeutic companies have learned to appreciate the role that peptide pharmaceuticals can play in addressing unmet medical needs and how this class of compounds can be an excellent complement or even a preferable alternative to small molecule and biological therapeutics. Rising rates of cancer and metabolic illnesses, increased funding for the study and development of novel drugs, and advancements in peptide therapy technology are all driving factors in the market.