testagen
TETRAPEPTIDE · KHAVINSON ENDOCRINE BIOREGULATOR · KEDG · NAME COLLIDES WITH A TESTOSTERONE GEL
also: KEDG · Lys-Glu-Asp-Gly · H-Lys-Glu-Asp-Gly-OH
Testagen is the Khavinson tetrapeptide Lys-Glu-Asp-Gly, described by the originating group as an endocrine-system bioregulator and sold on the research market as a testicular or testosterone-support peptide. Its published biology amounts to a single experiment showing that fluorescently labelled KEDG enters HeLa cell nuclei and binds particular DNA motifs. The only other indexed paper naming Testagen is a 2025 materials-chemistry study of its performance as a copper corrosion inhibitor.
// our evidence grade — unedited
Testagen's sequence is confirmed as Lys-Glu-Asp-Gly, but only two PubMed-indexed papers name it — one a HeLa nuclear-uptake experiment, the other a 2025 copper-corrosion-inhibition study — and the trials that a ClinicalTrials.gov search for 'Testagen' returns belong to an unrelated topical testosterone product.
We grade this compound and we sell it. The grade is set against our published criteria before any stocking decision and is not adjusted because it is in the catalogue.
read the full evidence →// specification
| full name | Testagen (Lys-Glu-Asp-Gly; KEDG tetrapeptide) |
| formula | C17H29N5O9 |
| molar mass | 447.4 g/mol |
| purity | ≥ 98% HPLC |
| form | lyophilised powder, sealed vial |
| storage | Lyophilised powder is stored desiccated at -20 °C and protected from light. Once reconstituted, laboratory practice is refrigeration at 2-8 °C for short-term use, or aliquoting and freezing to avoid repeated freeze-thaw cycles. Handling information only; this material has no approved human use. |
| solubility | Short hydrophilic peptide, readily soluble in sterile or bacteriostatic water and in dilute aqueous buffer. Lot-specific solubility is stated on the certificate of analysis. |
| sequence | Lys-Glu-Asp-Gly (KEDG) |
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crypto payment · research use only · not for human consumption
// others in Ancillary & Endocrine