Peptides are essentially naturally occurring or synthetic versions of amino acid chains. Usually these can be ordered and they will administer at home for things like weight loss, healing, anti-inflammatory benefits, cognitive benefits, pain management, enhanced immunity, anti-aging. Semaglutide is a medication in the GLP1 Receptor Agonist class which actually stands for glucagon-like Peptide1, so it even falls in the group of "peptides" that increase insulin production.