Hormonal
Testagen
Testagen is a synthetic tetrapeptide (Lys-Glu-Asp-Gly) developed as a testicular bioregulator within the Khavinson peptide bioregulation framework. It is designed to support and normalize testosterone-producing Leydig cell function through epigenetic modulation of gene expression in testicular tissue. Research has focused on its potential to maintain reproductive hormone balance during aging.
Quick Facts
Also known asKEDG, Lys-Glu-Asp-Gly
CategoryHormonal
Half-life30 minutes
Routessubcutaneous, oral
Common vial sizes20mg
Molecular weight447.4 Da
Chain length4 amino acids
SequenceLys-Glu-Asp-Gly
FDA statusNot approved
StorageRoom temperature (15-25°C). Reconstituted: 90 days.
Dosing Protocols
| Goal | Dose | Frequency | Route | Cycle | Notes |
|---|---|---|---|---|---|
| Starting/Titration Phase | 100 mcg | 1x/day | subcutaneous | 2 weeks | Weeks 1-2 starting dose. Synthetic Khavinson bioregulator targeting anterior pituitary function. |
| Building Phase | 150 mcg | 1x/day | subcutaneous | 2 weeks | Weeks 3-4. Gradual dose escalation. |
| Standard Maintenance | 200 mcg | 1x/day | subcutaneous | 4 weeks | Weeks 5-8. Supports TSH modulation and potential thyroid/testosterone optimization. |
| Maximum Protocol | 275 mcg | 1x/day | subcutaneous | 4 weeks on / 26 weeks off | 250-300mcg range, weeks 9-12. Total cycle 8-12 weeks with 4-6 month breaks between cycles. PubChem CID: 44568787. |
| Oral Supplementation | 1-2x/day with meals | oral | 3 weeks on / 17 weeks off | 1-2 capsules daily. Limited bioavailability data for oral route. |
Protocols shown are for informational purposes only. Consult a healthcare provider before starting any peptide protocol.
Track Your Testagen Protocol
Log doses, manage vial inventory, set injection reminders, and visualize blood concentration levels.
Start Tracking — FreeCommon Questions
How do I reconstitute Testagen?
Add bacteriostatic water to your Testagen vial (common sizes: 20mg). The amount of BAC water depends on your desired concentration. Use our reconstitution calculator for exact measurements.
What is the typical dose of Testagen?
A common dose for Testagen is 100 mcg 1x/day via subcutaneous. Weeks 1-2 starting dose. Synthetic Khavinson bioregulator targeting anterior pituitary function.
What is the half-life of Testagen?
The half-life of Testagen is approximately 30 minutes. This determines how long the peptide remains active in your body and influences dosing frequency.
How should I store Testagen?
Store Testagen at Room temperature (15-25°C). Bioregulatory peptide typically available in capsule form. Store in a cool, dry place. No reconstitution needed for oral formulations. Once reconstituted, use within 90 days.
Is Testagen FDA approved?
Testagen is not FDA approved and is available for research purposes only. It has not been evaluated by the FDA for safety or efficacy in humans.