Lab-tested lots · Same-day dispatch from Orlando
It startswith proof.
Research-grade peptides. Independent lab certificates, published. Purity guaranteed.
Buy 4, get 1 free · Ships today when ordered by 2pm ET
- Purity guarantee
- Below the certificate? Full refund or replacement.
- 162 certificates
- Published before you buy, keys checkable at the lab.
- Same-day dispatch
- Card orders cleared by 2pm ET ship that day, tracked.
- A person answers
- Write to [email protected]. No bot, no ticket queue.
In the lab now
Our own tests, ordered in our own name
Every certificate published so far was ordered by the manufacturer. We have sent sealed vials from our own stock to Janoshik with Lyra Vital named as the client. The reports go up on this site when they come back, whatever they say.
Sitewide · no code needed
Buy 4, get 1 free.
Add any five research vials and the lowest-priced one is on us, applied automatically in the cart. Up to three free vials per order. Accessories and bacteriostatic water excluded. Does not combine with a percentage code; you get whichever saves more.
Best sellers
All 29 compounds →
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
BPC-157
5–10mg · COA published
Synthetic pentadecapeptide derived from a gastric juice protein, widely studied for cytoprotection and angiogenic signaling.
- Purity
- 99.255%
- 8 lab certificates
TB-500
5–10mg · COA published
Synthetic thymosin beta-4, a 43-amino-acid actin-sequestering peptide studied for cell migration and angiogenesis.
- Purity
- 99.766%
- 5 lab certificates
GHK-Cu
50–100mg · COA published
Naturally occurring copper-binding tripeptide studied for extracellular matrix remodeling and gene expression modulation.
- Purity
- 99.912%
- 10 lab certificates
Most requested · LY3437943
Retatrutide, with every lot on the record
10mg, 15mg, 20mg, 30mg vials from $99. 19 Janoshik certificates, measured purity 99.29% to 99.91%, each verifiable by key at the lab. The lot behind every size, and who ordered each test, on one page.
For research use only. Not for human consumption.
Shop by research area
The Journal
How to verify a supplier, read a certificate, and weigh the published evidence.
Verification · 4 min
Lyra Vital Is Now Testing Its Own Stock at Janoshik
Every certificate we have published was ordered by the manufacturer. We have now sent sealed vials from our own shelf to Janoshik, in our own name, and every report goes up when it is issued, whatever it says.
Verification · 6 min
How to Verify a Janoshik Certificate in Five Checks
A Janoshik certificate is only as good as the record behind it. Entering the key takes a minute; knowing what to compare once the report loads is what actually catches a borrowed, edited or wrong-lot certificate.
Verification · 7 min
HPLC and Mass Spectrometry Answer Different Questions
Two techniques appear on almost every peptide certificate, and they are routinely treated as interchangeable evidence of quality. They are not. One measures proportion; the other measures mass.