Testagen Peptide for Sale
Published by Peptara Labs · Updated · How we research and check our pages
Four Amino Acids, a Small Lab Record
Testagen peptide from Peptara Labs (peptaralabs.io) is a 20mg research-grade vial for $47.5 USD, at its pre-sale price: 50% off the regular $95 until October 15, 17:00 UTC. Testagen is a chain of four amino acids, Lys-Glu-Asp-Gly. Its published record covers cells, birds and chemistry, and the verified search found no study that measured testosterone. Its batch certificate of analysis is pending, so no purity figure is claimed yet. Ships October 28. It is sold for research use only.
Pre-sale price, 50% off, ends October 15, 17:00 UTC
Pre-sale price, 50% off, ends October 15, 17:00 UTC
Flat $35 tracked shipping20mg per vial
Ships October 28
$47.50 USD
Was $95
The pre-sale price applies at every quantity. No code or multi-vial pricing is added to it.
Shipping, delivery and certificate status
- Shipping
- Flat $35, tracked worldwide to supported markets
- Delivery
- Ships October 28 · After dispatch: 5 to 10 business days
- Included
- Vial · Batch certificate pending · Order support on WhatsApp
Sources: Fedoreyeva 2011, PMID 22117547; Dobritescu 2025, PMID 40807317; verified PubMed searches, October 7, 2026; catalog records for price and shipping.
Buyer facts
What do you get when you buy Testagen from Peptara Labs?
You get one sealed 20mg vial of lyophilized Testagen, the four amino acid peptide Lys-Glu-Asp-Gly. Lyophilized means freeze-dried. Its batch certificate is pending, so no purity figure is claimed yet. The table reads price and availability from the same catalog and pricing records used for the order.
| Detail | Testagen | Where to check it |
|---|---|---|
| Vial | 20mg of lyophilized Testagen powder in a sealed vial | The order panel above |
| Price | $47.5 USD, at its pre-sale price: 50% off the regular $95 until October 15, 17:00 UTC | The order panel above |
| Availability | Ships October 28 | The order panel above |
| Certificate | Batch certificate pending | Certificates of analysis |
| Purity | No purity figure is claimed while the batch certificate is pending | Certificates of analysis |
| Sequence | Lys-Glu-Asp-Gly, also written KEDG | PubChem CID 123863700 |
| Formula and weight | C17H29N5O9, 447.4 g/mol | PubChem reference identity, not a measured batch result |
| Delivery | Ships October 28 · After dispatch: 5 to 10 business days | Delivery details are confirmed with your order |
| Status | Research use only | The study record and its limits below |
Share or cite this page
Sources: Catalog records for the order details; PubChem CID 123863700 for reference identity.
Before you buy
What should you check before you buy Testagen?
Check the amino acid sequence first. Testagen is also a trade name for unrelated products, so the name alone does not identify the peptide. This page is about Lys-Glu-Asp-Gly.
- Sequence. The listing should state Lys-Glu-Asp-Gly or KEDG. PubChem records this chain under CID 123863700, rather than under the name Testagen.
- Identity by mass. The reference molecular weight is 447.4 g/mol. A batch certificate should identify the chain by its mass, rather than rely on a purity percentage alone.
- Certificate status. The Peptara Labs batch certificate is pending. The reference formula and weight on this page are published identity data, rather than findings from this batch.
The Testagen match on ClinicalTrials.gov is a testosterone skin product that shares the name. It does not provide evidence for this peptide. For certificate checks, read how to verify peptide purity and the certificates page.
Sources: PubChem CID 123863700; ClinicalTrials.gov NCT02733133, checked October 7, 2026.
The short answer
What is Testagen?
Testagen is a lab-made peptide of four amino acids: lysine, glutamic acid, aspartic acid and glycine. The short form is Lys-Glu-Asp-Gly, or KEDG. Its published record is small and includes cell studies, bird studies and a chemistry paper.
The bird papers describe this chain as built to match the amino acids found in pituitary gland extracts. They examined the thyroid and thymus in birds without a pituitary. That description differs from the testis label often attached to Testagen online. Neither a trade name nor a tissue label substitutes for what a study measured.
Sources: Fedoreyeva 2011, PMID 22117547; Kuznik 2008, PMID 19024016; Dobritescu 2025, PMID 40807317.
The science
What have lab studies measured with Testagen?
The studies looked at where the peptide went inside cells, what it bound in a test tube and how gland tissue changed in birds. These are different kinds of tests. A binding result does not establish what the peptide does in a whole animal, and a bird result does not establish an effect in people.
Enters the cell nucleus
Labeled Testagen entered the cytoplasm, nucleus and nucleolus of HeLa cells. The nucleus holds DNA; the nucleolus is a smaller part inside it.
Binds DNA and histones
Test-tube studies examined binding to DNA pieces and wheat histones, the proteins DNA wraps around. The DNA work suggested a preference for pieces containing CAG.
Thyroid and thymus in birds
Studies compared KEDG with Ala-Glu-Asp-Gly in birds without a pituitary. They measured thyroid hormones and thyroid or thymus structure.
Sources: Fedoreyeva 2011, PMID 22117547; Fedoreyeva 2013, PMID 23581987; Kuznik 2008 and 2011, PMIDs 19024016 and 22268052; Pateyk 2013, PMID 23658898.
Applications
What research areas is Testagen studied in?
Peptide and DNA binding
Cell imaging and test-tube binding work examined the chain near genetic material. The cell work used labeled peptides so the researchers could track them.
Peptide and histone binding
A separate study tested short peptides, including Lys-Glu-Asp-Gly, against labeled wheat histones. It was a molecular binding test.
Glands in birds without a pituitary
The bird studies examined thyroid and thymus structure, thyroid hormones, and immune or clotting markers in this specific animal model.
Metal corrosion chemistry
In salt water, KEDG slowed copper corrosion by about 86 percent in the reported test. This is a materials science result, rather than evidence about biology.
Sources: Fedoreyeva 2011 and 2013, PMIDs 22117547 and 23581987; Kuznik 2010, PMID 20731122; Pateyk 2013, PMID 23658898; Dobritescu 2025, PMID 40807317.
Comparison
Testagen vs Epithalon: how do they differ?
Both chains have four amino acids and end in Glu-Asp-Gly. Their first amino acid differs, and that changes their formula and weight. Several bird studies tested both chains in the same model.
| Peptide | Sequence | Formula and weight | Shared research |
|---|---|---|---|
| Testagen | Lys-Glu-Asp-Gly | C17H29N5O9, 447.4 g/mol | Bird thyroid and thymus studies; the thymus paper reported a stronger response for this chain |
| Epithalon | Ala-Glu-Asp-Gly | C14H22N4O9, 390.35 g/mol | Compared with Lys-Glu-Asp-Gly in the same bird studies |
Testagen is also searched beside kisspeptin. Kisspeptin is a natural, much longer peptide with a separate hormone study record, including a study in six men. Testagen has no published study in people. Their names appearing together in a search does not make their evidence interchangeable.
Sources: PubChem CIDs 123863700 and 219042; Kuznik 2008 and 2011, PMIDs 19024016 and 22268052; Pateyk 2013, PMID 23658898; Dhillo 2005, PMID 16174713.
Evidence
What does the published record show?
The verified searches on October 7, 2026 found no paper connecting this exact sequence with testosterone or testis. They also found a trade name collision. The table separates those search results from the labels often used for Testagen.
| Common claim online | What the record shows |
|---|---|
| A testis peptide tied to testosterone | 0 PubMed records for Lys-Glu-Asp-Gly with testosterone and 0 with testis. The bird papers describe a pituitary origin and examine other glands. |
| A clinical study record | The matching Testagen trial is a testosterone skin product that shares the trade name, rather than this peptide. |
| Many papers under this name | The name Testagen returns 2 PubMed records: a cell nucleus study and a copper corrosion study. Sequence-based searches also find the bird and histone papers. |
| Identity settled by the name | PubChem lists Lys-Glu-Asp-Gly under CID 123863700. The amino acid chain identifies the molecule more clearly than the trade name. |
A search result count is tied to its search terms and date. It does not settle every possible use of a chain. Here it shows why the page describes the measured cell, bird and chemistry work instead of making a hormone claim.
Sources: PubMed searches and ClinicalTrials.gov NCT02733133, checked October 7, 2026; PubChem CID 123863700; Fedoreyeva 2011, PMID 22117547; Dobritescu 2025, PMID 40807317.
Research timeline
How the Testagen record was built
Research timeline
How the Testagen record was built
Research timeline
How the Testagen record was built
2008: thyroid work in birds
A study compared Lys-Glu-Asp-Gly with Ala-Glu-Asp-Gly in chickens without a pituitary gland.
2010 to 2011: more bird studies
Papers examined thyroid, immune and clotting markers in young chickens and old hens.
2011: tracking inside cells
Labeled Testagen entered the cytoplasm, nucleus and nucleolus of HeLa cells.
2013: thymus and histones
Separate papers examined thymus structure in birds and binding to wheat histones in a test tube.
2025: copper chemistry
A materials study tested Testagen on copper corrosion in salt water.
Sources: Kuznik 2008, 2010 and 2011, PMIDs 19024016, 20731122 and 22268052; Fedoreyeva 2011 and 2013, PMIDs 22117547 and 23581987; Pateyk 2013, PMID 23658898; Dobritescu 2025, PMID 40807317.
Your Kit
What's Included
$47.5 USD Was $95 USD
Flat $35 tracked shipping · Ships October 28 · Batch certificate pending · Order support on WhatsApp
Pre-sale price, 50% off, ends October 15, 17:00 UTC
Testagen 20mg Vial
20mg per vial
Batch certificate
Batch certificate pending
Delivery
Ships October 28 · After dispatch: 5 to 10 business days
Order support
Contact our team about your order or batch certificate.
Your order includes the vial. Batch certificate pending. Delivery details are confirmed with your order. Order support is available on WhatsApp.
Your Research Order
Testagen research vial, batch certificate status, delivery and order support.
Batch certificate
Batch certificate pending
Delivery
Ships October 28 · After dispatch: 5 to 10 business days
Order support
Contact our team about your order or batch certificate.
Research and citations
Sources
- Kuznik et al., 2008. Lys-Glu-Asp-Gly and Ala-Glu-Asp-Gly in the thyroid gland of chickens without a pituitary. Bull Exp Biol Med. PMID 19024016. doi.org/10.1007/s10517-008-0033-6
- Kuznik et al., 2010. The two tetrapeptides and immune, clotting and thyroid markers in birds. Patol Fiziol Eksp Ter. PMID 20731122. pubmed.ncbi.nlm.nih.gov/20731122/
- Kuznik et al., 2011. Thyroid hormone activity and structure in young chickens and old hens without a pituitary. Bull Exp Biol Med. PMID 22268052. doi.org/10.1007/s10517-011-1177-3
- Fedoreyeva et al., 2011. Short labeled peptides entering the nucleus of HeLa cells. Biochemistry (Mosc). PMID 22117547. doi.org/10.1134/S0006297911110022
- Pateyk et al., 2013. The two tetrapeptides and thymus structure in young and old birds without a pituitary. Bull Exp Biol Med. PMID 23658898. doi.org/10.1007/s10517-013-2029-0
- Fedoreyeva et al., 2013. Short peptides binding labeled wheat histones. Biochemistry (Mosc). PMID 23581987. doi.org/10.1134/S0006297913020053
- Dobritescu et al., 2025. Testagen and copper corrosion in salt water. Molecules. PMID 40807317. doi.org/10.3390/molecules30153141
- Dhillo et al., 2005. Kisspeptin-54 and hormone markers in six men. J Clin Endocrinol Metab. PMID 16174713. doi.org/10.1210/jc.2005-1468
- PubChem, Testagen sequence. H-Lys-Glu-Asp-Gly-OH, CID 123863700. pubchem.ncbi.nlm.nih.gov/compound/123863700
- PubChem, Epithalon. Epitalon, CID 219042. pubchem.ncbi.nlm.nih.gov/compound/219042
- PubMed searches, October 7, 2026. Searches for Testagen and for Lys-Glu-Asp-Gly with testosterone or testis, recorded in the scope brief. pubmed.ncbi.nlm.nih.gov/?term=testagen
- ClinicalTrials.gov, October 7, 2026. NCT02733133 is a testosterone skin product that shares the name Testagen, rather than this peptide. clinicaltrials.gov/study/NCT02733133
Explore more
Related guides, comparisons, and compounds studied for related endpoints
Epithalon
The Ala-Glu-Asp-Gly peptide compared with Testagen in cell and bird research.
Kisspeptin
A different peptide with a separate hormone study record.
Peptide longevity research
How to read the evidence across short peptide research.
Cartalax
A related short peptide, covered on its own research page.
Vilon
A related short peptide and its separate research record.
Certificates of analysis
Published certificates and pending batch status.
How to verify peptide purity
How identity and purity checks differ on a certificate.
Peptide glossary
Plain definitions of the research terms on this page.
What are peptides
The basics of amino acid chains and research peptides.
Buying Testagen: FAQ
Where can I buy Testagen peptide?
Peptara Labs sells Testagen online as a 20mg research-grade vial, ordered from this page. The name is also used on unrelated products, so check that a listing says Lys-Glu-Asp-Gly and that its certificate confirms it. The price is $47.5 USD, at its pre-sale price: 50% off the regular $95 until October 15, 17:00 UTC. Ships October 28. Its batch certificate is pending, so no purity figure is claimed yet.
Testagen FAQ
What is Testagen?
Testagen is a lab-made peptide of four amino acids, Lys-Glu-Asp-Gly, also written KEDG. It comes from a Russian research program on very short peptides. Its published record is a few cell, bird and chemistry studies.
What has Testagen been studied for?
Lab studies tracked it into the nucleus of human cells and measured how it binds DNA and histones in a test tube. Bird studies measured the thyroid and thymus in chickens without a pituitary gland. A 2025 paper tested it on copper corrosion. No published study has tested this peptide in people.
Does Testagen raise testosterone?
The verified search found no published study that measured testosterone with Testagen. A PubMed search on October 7, 2026 for its sequence with testosterone or testis returned no records. The claims found online were not supported by a study in that search.
How is Testagen different from kisspeptin?
They are different peptides. Kisspeptin is a natural, much longer peptide with its own small hormone studies, including a 2005 study in six men. Testagen is a four amino acid chain with no published study in people. The kisspeptin page explains its separate record.
What are the side effects of Testagen?
No published study has tested Testagen in people, so that record cannot describe side effects in people. Missing data does not establish safety. Peptara Labs sells Testagen for lab research only.
Sources: Fedoreyeva 2011 and 2013, PMIDs 22117547 and 23581987; Kuznik 2008, PMID 19024016; Pateyk 2013, PMID 23658898; Dobritescu 2025, PMID 40807317; Dhillo 2005, PMID 16174713; PubMed searches, October 7, 2026.
Order Testagen, 20mg vial
Order Testagen. Ships October 28 · After dispatch: 5 to 10 business days. Order support on WhatsApp.
Order NowBatch certificate pending · Ships October 28 · Order support on WhatsApp