Testagen
Also known as: Lys-Glu-Asp-Gly
Testagen is a synthetic tetrapeptide (Lys-Glu-Asp-Gly / KEDG) from the Khavinson bioregulator series, claimed to target testicular tissue. Not FDA-approved. Evidence base is extremely thin, with essentially no independently replicated or peer-reviewed support for the advertised reproductive or endocrine benefits in humans.
Pricing for Testagen
Live vendor pricing, normalized to $/mg so sizes compare fairly — fused with each seller's Merit trust score and latest independent COA purity. Prices refresh daily.
COAs for Testagen
14 third-party tests across 6 vendors. Each card links to the full report.
For
Testagen
by Skye Peptides· batch TGN26-50-001
For
Testagen
by BioLongevity Labs· batch 43-3-46035
For
Testagen
by Mile High Compounds· batch TST-025-MH-01
For
Testagen
by BioLongevity Labs· batch cmojb7547018rkirxh26gfiei
For
Testagen
by Verified Peptides· batch 09-25-0120A
For
Testagen
by Glacier Aminos· batch TST20GA01
For
Testagen
by BioLongevity Labs· batch cmojb6v9x016fkirxtqrdfa13
For
Testagen
by Peptide Tech· batch TSG-8470
Purity not on file
For
Testagen
by Skye Peptides· batch TGN26-50-001
Purity not on file
For
Testagen
by Skye Peptides· batch TGN26-50-001
Purity not on file
For
Testagen
by BioLongevity Labs· batch 43-3-45952
Purity not on file
For
Testagen
by BioLongevity Labs· batch cmojb7509018qkirxcwyjtjsm
Purity not on file
For
Testagen
by Verified Peptides· batch 09-25-0120A
Purity not on file
For
Testagen
by Skye Peptides· batch TGN26-50-001
7 citations indexed for Testagen
rct · 2027
Product Transference Study of Testagen™ TDS®-Testosterone
This study will assess the potential of Testagen® TDS-Testosterone to enable transfer of Testosterone to females coming in contact with skin to which Testagen® TDS-Testosterone has been applied and the potential of product to raise serum androgen levels in those women.
animal · 2026
Relationships of Anemia, Serum Iron, and Serum Copper in Hospitalized Alpacas (Vicugna pacos)
A large number of South American camelids (SAC) presented to a veterinary clinic are diagnosed with anemia.
Study · 2025
The Inhibitory Effect and Adsorption Properties of Testagen Peptide on Copper Surfaces in Saline Environments: An Experimental and Computational Study
Experimental and theoretical studies were applied to investigate the adsorption properties of testagen (KEDG) peptide on copper surfaces in sodium chloride solution and, implicitly, its inhibition efficiency (IE) on metal corrosion.
review · 2022
Transport of Biologically Active Ultrashort Peptides Using POT and LAT Carriers
Ultrashort peptides (USPs), consisting of 2-7 amino-acid residues, are a group of signaling molecules that regulate gene expression and protein synthesis under normal conditions in various diseases and ageing. USPs serve as a basis for the development of drugs with a targeted mechanism of action.
review · 2021
Peptide Regulation of Gene Expression: A Systematic Review
Peptides are characterized by their wide range of biological activity: they regulate functions of the endocrine, nervous, and immune systems.
rct · 2012
Evaluation of the impact of the plastic BioSand filter on health and drinking water quality in rural Tamale, Ghana
A randomized controlled trial of the plastic BioSand filter (BSF) was performed in rural communities in Tamale (Ghana) to assess reductions in diarrheal disease and improvements in household drinking water quality.