Testagen (Bioregulator) from Xcel Peptides

Xcel Peptides supplies Testagen as a lyophilized bioregulator peptide for laboratory use. We test every batch independently before release, and we publish the certificate of analysis on this page, matched to the batch number on your vial.

What Is Testagen

Testagen is a synthetic tetrapeptide made of four amino acids: lysine, glutamic acid, aspartic acid, and glycine (Lys-Glu-Asp-Gly, or KEDG). Its molecular weight is about 447.4 g/mol. It belongs to the short-peptide bioregulators developed by Vladimir Khavinson and colleagues in Russia, which were designed to match small peptide fractions isolated from specific tissues. Researchers derived the KEDG sequence from analysis of testicular tissue extracts.

Specifications

The product is a lyophilized powder at research grade. We verify every batch through third-party HPLC and identity analysis, and we document it with a matched COA. Store the powder frozen and protect it from light. We ship every order cold-chain with tracking.

Research Applications

Researchers study Testagen in gene expression and short-peptide research. Typical work examines how the KEDG sequence interacts with DNA and chromatin-associated proteins in cell-based models, and how it influences gene expression in cultured cells of the tissue it was derived from. Scientists also use it as a reference peptide when comparing Khavinson-class bioregulators.

These describe research applications, not therapeutic claims. The FDA has not evaluated this product, and researchers should not use it to diagnose, treat, cure, or prevent any condition.

Why Buy Testagen From Xcel Peptides

Misinformation is common in this category, and some sellers describe short peptides as if they were hormones. Xcel Peptides lists the exact sequence and molecular weight for Testagen and tests each batch to confirm identity, so your records match the material you receive.

We also publish our results openly. You can match the batch number on your vial to the COA before you start work, instead of relying on a generic purity claim.

Storage and Handling

Store the lyophilized vial frozen and protected from light before reconstitution. Once reconstituted, refrigerate the solution and use it within a short window, since peptide stability drops considerably outside the dry state. Avoid repeated freeze-thaw cycles, since each cycle degrades the peptide structure further.

Verifying Your COA

Check three things on the COA before you use this product. First, confirm the batch number matches your vial. Second, confirm the test date is recent. Third, confirm the HPLC purity and the identity result match the KEDG sequence and the 447.4 g/mol mass for your size. If you need archived data for a previous lot, contact our team and we’ll pull it for you.

Disclaimer (place directly under description): Xcel Peptides supplies Testagen (Bioregulator) for laboratory and research use only. It is not a drug, dietary supplement, or food, and researchers should not use it for human or animal consumption, or for diagnostic or therapeutic use. Nothing on this page constitutes medical advice.

Frequently Asked Questions

What is Testagen? It’s a synthetic tetrapeptide (Lys-Glu-Asp-Gly) from the Khavinson family of short-peptide bioregulators. Xcel Peptides supplies it as a research-grade lyophilized peptide.

Is Testagen a testosterone or a hormone? No. Testagen is a four-amino-acid peptide, not a hormone, and it is not an androgen receptor agonist. Any seller claiming otherwise is making an unsupported claim.

What is a bioregulator peptide? It’s a short peptide, usually two to four amino acids, designed to match a fraction isolated from a specific tissue. Researchers study how these peptides affect gene expression in cell models.

Does Testagen come with a COA? Yes. Xcel Peptides ships every vial with a batch-matched certificate of analysis confirming identity and purity.

How should I store Testagen? Store the lyophilized powder frozen and protected from light. After reconstitution, refrigerate the solution and avoid repeated freeze-thaw cycles.

How fast does Xcel Peptides ship this product? We ship most orders within 1 to 2 business days, with cold-chain packaging and tracking included.