Fourteen compounds.
Every lot, tested.

Studied for

• Tissue organisation & structural response
• Vascular & microcirculatory models
• Gut & mucosal research
• Inflammatory signalling & cellular stress

How it works in laboratory models

In laboratory models it acts across several signalling systems rather than one receptor: nitric-oxide and vascular signalling (the Src / Caveolin-1 / eNOS pathway), angiogenic responses involving VEGF and FAK, and the balance of cellular stress and inflammation.

Studied for

• Cytoskeletal & cell-motility models
• Endothelial & vascular research
• Tissue response & repair models
• Comparative peptide research

How it works in laboratory models

It binds monomeric G-actin, the building block of the cell's cytoskeleton, and so shapes filament dynamics: the machinery cells use to move, migrate and reorganise. Much of the literature studies the full-length protein, which the fragment is derived from.

Studied for

• Endothelial & vascular cell culture
• Animal-model tissue studies
• Cytoskeletal & analytical reference use

How it works in laboratory models

Two unrelated pathways in one preparation: BPC-157's nitric-oxide and angiogenic signalling, and TB-500's actin binding and cytoskeletal reorganisation. Each component has its own literature; the pairing itself is a community convention rather than a published protocol.

Studied for

• GHRH-receptor pharmacology & binding
• Comparative stability studies
• Analytical reference standard

How it works in laboratory models

It binds the growth-hormone-releasing-factor receptor on pituitary somatotrophs and raises cyclic AMP. A D-alanine at position two blocks the enzyme (DPP-IV) that would otherwise clip the native hormone within minutes.

Studied for

• Pituitary cell & receptor assays
• Skeletal endpoints in rodent models
• Comparative secretagogue pharmacology

How it works in laboratory models

An agonist at the ghrelin receptor GHS-R1a, a receptor separate from the GHRH receptor, where it mobilises intracellular calcium. Non-standard amino acids (Aib and D-configured aromatics) give the short chain its stability.

Studied for

• GRF-receptor signalling (CJC-1295)
• GHS-R1a signalling (ipamorelin)
• Two targets in one preparation

How it works in laboratory models

CJC-1295 raises cyclic AMP through the growth-hormone-releasing-factor receptor; ipamorelin mobilises calcium through GHS-R1a. Each component has its own literature; the pairing is a convention rather than a published combination.

Studied for

• Clinical literature of the approved medicine (visceral adiposity, metabolic profile)
• Receptor & analytical characterisation
• Comparative structural work against shorter analogues

How it works in laboratory models

It binds the GHRH receptor on anterior-pituitary somatotrophs, signals through the stimulatory G protein and raises cyclic AMP. The acyl group resists peptidase breakdown, and the full-length chain makes it the reference comparator for 29-amino-acid analogues.

Studied for

• Receptor binding & cell-based signalling assays
• Islet & adipocyte culture systems
• Clinical literature context (SURPASS, SURMOUNT)

How it works in laboratory models

Dual agonism at the GIP and GLP-1 receptors, with a reported signalling bias at GLP-1 receptors that favours cyclic AMP over β-arrestin recruitment. Albumin binding extends the time it stays in circulation.

Studied for

• Multiplexed receptor-signalling assays
• Comparative polyagonist pharmacology
• Analytical method development
• Phase 2 literature (NEJM 2023)

How it works in laboratory models

All three receptors couple to adenylate cyclase, so cyclic AMP is the shared readout. The activity is deliberately unbalanced across the three targets rather than equal, which is what makes it a distinct research tool from dual agonists.

Studied for

• Enzyme assays & biochemical reagent use
• Cellular metabolism & mitochondrial studies
• Ageing biology & analytical standards

How it works in laboratory models

As a redox cofactor it carries electrons between reactions; as a substrate it is consumed by sirtuins and PARPs, the enzymes most associated with DNA repair and metabolic regulation in the literature.

Studied for

• Cellular metabolism assays
• Mitochondrial-derived peptide comparison (humanin, SHLPs)
• Analytical method development
• Exercise & metabolism literature (Cell Metab 2015, 2018)

How it works in laboratory models

No cell-surface receptor has been established. The cited work describes interference with the folate cycle leading to AICAR accumulation, which indirectly activates AMPK, the cell's energy sensor; separate studies describe it moving into the nucleus under metabolic stress.

Studied for

• Dermal fibroblast & skin models
• Connective-tissue remodelling in rodents
• Reference metallopeptide in coordination chemistry

How it works in laboratory models

Three reported themes: reversible copper coordination, transcriptional shifts in matrix-associated genes in cultured fibroblasts and animal tissue, and changes in oxidative markers and the balance of matrix synthesis and degradation.

Studied for

• Rodent hippocampal & brain-tissue studies (BDNF, trkB)
• Transcriptional profiling in ischaemia models
• Peptide stability & analytical work

How it works in laboratory models

No classical receptor agonism has been established. The mechanism literature centres on reported increases in BDNF and its receptor trkB in rat hippocampal tissue, with broad transcriptional changes across neurotrophin, immune and vascular gene sets. The Pro-Gly-Pro tail slows enzymatic breakdown.

Studied for

• Receptor-selectivity profiling (MC3R, MC4R)
• Central melanocortin signalling in neural circuits
• Analytical & stability method development
• Phase 3 literature of the approved medicine

How it works in laboratory models

An agonist at melanocortin receptors, with most of the literature on MC3R and MC4R, which raise cyclic AMP. It acts centrally, on signalling in the brain, rather than on blood flow, and the cyclic structure limits backbone flexibility, improving affinity and resistance to enzymes.