COA
Certificate of Analysis
Third-party HPLC and MS testing for every batch, published before purchase and tied to the batch being sold.
HPLC / MSVR-TZ
Metabolic Research
VR-TZ10mg
Dual GLP-1 / GIP receptor agonist.
$79per vial
Product handling note
Lyophilized powder may shift or come loose during transit; that is a normal occurrence and does not affect the integrity of the research product. Fill appearance and batch-specific details may vary. Refer to the Certificate of Analysis below for the documentation tied to the current batch.
Research overview
Why researchers study dual incretin peptides.
VR-TZ sits in the dual incretin research category, meaning it is studied around two related signaling systems: GIP and GLP-1. Researchers look at this class to understand how those two pathways interact compared with a peptide focused on GLP-1 alone.
The important point is the comparison: one pathway versus two, and how that changes the biology being studied. That is why VR-TZ naturally sits next to VR-RT in the catalog.
The receipts
What you get with every vial.
ID
Batch traceability
Every vial is stamped with a batch ID that links back to its COA, source record, and current product documentation.
Batch linkedLabel
Batch-linked labeling
Product identity, strength, and batch reference stay easy to match from the product listing to the vial in hand.
Listing to vialRelated peptides
Adjacent research lanes.
Product FAQ
Common research questions.
What does "biased signaling" mean here?
A receptor can send more than one type of intracellular signal after a ligand binds. Published dual-incretin pharmacology discusses cAMP signaling, beta-arrestin recruitment, and receptor internalization as separate pieces of the receptor story.
Is dual incretin activity always a clean 50/50 split?
No. The better question is receptor balance: potency, efficacy, and signaling can differ between GIPR and GLP-1R. That is why dual-pathway research often looks at how strongly each receptor is engaged, not just whether both are listed.
Why does receptor internalization matter?
Internalization is one way cells regulate receptor activity after stimulation. In plain terms, it helps researchers understand whether a signal stays mainly at the cell surface, moves inside the cell, or fades differently over time.
What should the batch documentation answer?
It should answer the boring but important questions: is the identity confirmed, what purity was measured, what batch code was tested, and does that code match the vial being sold?
Research sources
Literature links are included for background reading. Batch-specific identity and purity details live in the COA tied to the current batch.