Metabolic Research Peptides
Compounds in this category are studied for their effects on glucose regulation, satiety signalling and energy metabolism in preclinical models. Three act on incretin receptors — GLP-1, GIP and glucagon — while two reach the same research area by different mechanisms. This is the most heavily published area of peptide research in the last decade.
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Certificates published
Published across 5 compoundsin this group, current and prior lots. Every certificate is issued by an independent laboratory and carries the issuing lab’s verification key, so each result can be checked with the laboratory directly.
Semaglutide
5–20mg · COA published
Long-acting GLP-1 receptor agonist studied extensively for incretin pathway signaling and glucose regulation in preclinical models.
- Purity
- 99.728%
- 9 lab certificates
Tirzepatide
10–30mg · COA published
Dual GIP and GLP-1 receptor agonist — a 39-amino-acid synthetic peptide studied for combined incretin pathway activity.
- Purity
- 99.634%
- 13 lab certificates
Retatrutide
10–30mg · COA published
Triple agonist at GIP, GLP-1, and glucagon receptors — among the most actively studied compounds in current metabolic research.
- Purity
- 99.637%
- 19 lab certificates
Cagrilintide
10mg · COA published
Long-acting amylin analog studied at calcitonin and amylin receptors — a satiety pathway mechanistically distinct from incretin agonism.
- Purity
- 99.939%
- 3 lab certificates
AOD-9604
5mg · COA published
C-terminal fragment of human growth hormone studied for lipolytic activity without the growth-promoting effects of the full hormone.
- Purity
- 99.783%
- 5 lab certificates
Direct comparisons in this area
Shortlisting within a research area is where most of these decisions actually get made, so the pairs are compared on the same measured figures rather than on claims.
Cagrilintide vs Semaglutide
Amylin versus incretin signaling — mechanistically independent satiety pathways, which is why they appear together in combination studies.
Semaglutide vs Retatrutide
The two ends of the incretin design space: a selective GLP-1 analog against a triple agonist.
Tirzepatide vs Retatrutide
Dual versus triple agonism. The question is what glucagon receptor activation adds beyond incretin signaling.
Semaglutide vs Tirzepatide
Single versus dual incretin receptor engagement — the central comparison in current metabolic pharmacology.
AOD-9604 vs Cagrilintide
AOD-9604 vs Retatrutide
How the compounds in this group differ
The incretin compounds form a ladder of receptor coverage rather than a ladder of potency. Semaglutide is a single-target GLP-1 receptor agonist. Tirzepatide adds GIP, making it a dual agonist across two incretin receptors. Retatrutide adds glucagon on top of both and is studied as a triple agonist. Each additional receptor changes the published pharmacology rather than simply scaling it, which is why the comparisons here put compounds side by side on measured figures instead of ranking them.
Two of the five sit outside the incretin pathway entirely. Cagrilintide is a long-acting amylin analog acting at calcitonin and amylin receptors, a satiety mechanism distinct from incretin agonism. AOD-9604 is the C-terminal 176-191 fragment of human growth hormone, studied for lipolytic activity without the growth-promoting signalling of the intact hormone. Grouping all five as metabolic research compounds reflects the research area, not a shared receptor.
What the certificate covers, and how to check it without us
Every batch in this group is tested by Janoshik Analytical, an independent laboratory, and the certificate is published on the product page before purchase rather than supplied on request. Each report covers purity by HPLC and identity by mass spectrometry for one specific lot.
The lot code printed on the vial matches the certificate shown on the page, and each certificate carries the task number and verification key needed to pull the original report directly from the laboratory. Nothing in that chain requires trusting this site. Superseded batches stay published alongside the current one, because a testing history is more informative than a single clean snapshot.
Form, storage and reconstitution
These compounds ship as lyophilized powder in sealed vials and tolerate room temperature in transit. For longer holding, keep sealed vials refrigerated and out of direct light; each product page carries the specific storage window for that compound.
Reconstitution is normally performed with bacteriostatic water, sterile water preserved with 0.9% benzyl alcohol so one vial can be accessed repeatedly across a set. Direct the solvent slowly down the wall of the vial and swirl rather than shake, since agitation denatures peptides in solution.
Certificates of analysis in this area
Other research areas