Agonist

An agonist is a molecule that binds to a receptor and triggers a response — it turns the receptor “on,” imitating the body’s own signaling molecule. The opposite, an antagonist, blocks the receptor instead.

Many research peptides are described by which receptors they act on and whether they are mono-, dual-, or triple-agonists. For example, in GLP research a single molecule may act as an agonist at more than one receptor at once.