Library · Reproductive · Male reproductive system and testosterone support
Testagen (Lys-Glu-Asp-Gly)
Lys-Glu-Asp-Gly, KEDG peptide, Testagen peptide
A synthetic tetrapeptide (Lys-Glu-Asp-Gly) 'bioregulator' studied for male reproductive health, aimed at normalizing testosterone, sperm quality, and sexual function by influencing gene expression in the testes.
Research score 40/100. Reference only, not a dose.
- Hormone Regulation
- Fertility Enhancement
- Libido Enhancement
- Recovery Enhancement
- US status
- Research Chemical
- Approval
- Research Chemical Only
- Evidence
- Russian studies. No FDA approval.
- Research score
- 40 / 100
- Indication
- Research Only - No Medical Indication
- Origin
- Russia
- Source category
- Reproductive System
- Status group
- Research chemical
Mechanism
Enhances signaling along the hypothalamic-pituitary-gonadal axis, raising LH and FSH release to boost testosterone production in Leydig cells and support sperm production in Sertoli cells, partly via increased StAR protein expression and antioxidant protection of reproductive tissue.
Safety file
Generally described as safe within its bioregulator class; mild side effects reported.
- Injection site reactions
- Hormone level fluctuations
- Mood changes