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Dosage GuideResearch Reference

Testagen Dosage

Research-based dosing protocols, timing guidance, and reconstitution reference for Testagen. All information is for educational purposes only.

Quick Answer

Testagen (Lys-Glu-Asp-Gly) is a synthetic tetrapeptide bioregulator being researched for its potential to support testicular tissue. Dosages used are solely for preclinical research. There are no established human clinical dosages. Any self-administration is experimental and potentially unsafe.

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Table of Contents

Standard Dosage Range

Research dosing range: 10–100 mcg (preclinical research only)

Educational reference only

These dosage ranges are derived from preclinical research and community protocols. No human clinical dose-ranging trials have established therapeutic doses for most research peptides. Always consult a qualified healthcare provider before starting any peptide protocol.

Dosage by Use Case

Leydig Cell Support (preclinical)

10–50 mcg1× daily
Duration

4–8 weeks

Subcutaneous or intramuscular injection in animal models. No human data exists. Used to study effects on testosterone production.

Sertoli Cell Support (preclinical)

20–100 mcg1× daily
Duration

4–8 weeks

Subcutaneous or intramuscular injection in animal models. Used to study effects on spermatogenesis.

Age-Related Testicular Decline (preclinical)

50–100 mcg1× daily
Duration

4–12 weeks

Animal studies in aging male models. Aim is to maintain testicular function. No human data.

Timing & Frequency

In preclinical studies, injections are typically administered in the morning. No human data exists regarding optimal timing.

Cycle Guidance

Preclinical studies often use 4–12 week cycles. No human safety data exists, so cycle guidance is hypothetical and based on analogous peptide research protocols.

Reconstitution Reference

Quick reference for reconstituting Testagen. For custom vial sizes and concentrations, use the Reconstitution Calculator.

Common Vial SizeTypically 1 mg per vial (research grade)
BAC Water Volume1 mL bacteriostatic water for 1 mg/mL concentration
Concentration & DrawAt 1 mg/mL: 10 mcg = 0.01 mL (1 unit on a 100-unit insulin syringe)
StorageRefrigerate at 2–8°C after reconstitution. Keep lyophilized powder at room temperature or refrigerated.
StabilityReconstituted solution stable up to 30 days refrigerated. Lyophilized powder stable 12-24 months per manufacturer specifications.
Use the Reconstitution Calculator → for precise injection volumes based on your exact vial size, water volume, and desired dose.

Frequently Asked Questions

What is the typical dosage for Testagen?
There is no established therapeutic dosage for Testagen. It is a preclinical research compound. Dosages used in animal studies range from 10-100 mcg per day.
Can Testagen replace testosterone?
No. Testagen is not a testosterone replacement therapy. It is an experimental compound being researched for its potential to support testicular function. It has not been shown to raise testosterone levels in humans. Standard medical treatments for hypogonadism (testosterone injections, gels, etc.) are the only proven methods.
How is Testagen administered?
In preclinical studies, Testagen is typically administered via subcutaneous or intramuscular injection. Oral bioavailability is unknown. No route of administration has been established for human use.

Last updated: 2026-02-19