The design problem
Building one peptide that binds three related receptors means finding a sequence sharing enough features with each native ligand to be recognised by all three, then tuning relative potency. Change the ratio and the molecule behaves differently even though its targets are unchanged.
Why not three separate molecules
Three compounds means three pharmacokinetic profiles, three clearance rates and a combination that varies continuously as each is cleared. A single molecule holds the ratio fixed by construction, which makes the experiment interpretable.
What the literature examines
Receptor binding and selectivity across all three targets, downstream signalling from each, and metabolic endpoints in preclinical and clinical study populations. Comparisons against single and dual agonists are common, since the question is what the third arm adds.
Reading it carefully
This is a description of a research field, not a recommendation. Findings in study populations under supervision do not transfer to other settings, and nothing here suggests any use of these compounds.
Research use only. This page is explanatory and does not recommend any use, quantity or procedure. REVIVE LAB supplies reference materials for laboratory research. These are not medicines and are not for human or veterinary consumption. Anyone considering the use of any compound in humans should do so only under qualified medical supervision.