Testagen_Dosage, benefits & legal status
Also known as Testagen, KEDG, Lys-Glu-Asp-Gly
A lab-made 4 amino acid peptide aimed at the testes.
Common vial size is what vendors typically sell, not a recommendation. Enter your own vial in the calculator.
What is Testagen?
Plain language first. The technical label stays, but it never stands alone.Overview
It is marketed for testicular function and testosterone as you age. There is very little real human research behind it.
Testagen is a 4-amino-acid 'bioregulator' from the Russian Khavinson family.
What it's used for
Marketed for testicular function and testosterone with age. Taken in short courses.
How does Testagen work?
What it does in the body, and where.Testagen is 4 amino acids long, written KEDG.
- 01The claim is testicular supportGiven in courses on the theory that it acts on the tissue it was derived from.
- 02No citable human evidenceNo hormone measurements for this peptide appear in the English-language literature.
What else is it used for?
Each use below carries its own evidence level. Approved means regulators have cleared it for that purpose. Investigational means it is in trials. Early research means it is being studied and is not established.
- Supporting the testes with age, which is the claim made for itResearch only
- The lab-made counterpart to the testes extract sold as Testoluten.Early research
The published record
Papers and trials about Testagen
2 papers tagged human · 1 not reviews or lab · 0 clinical trial publications
1 registered trials · none with posted results
Furthest stage reached: Phase 2, not yet recruiting
Counted from Europe PMC indexing, not read by a person; a human tag can land on reviews, commentary or lab papers; clinical trial publications is the narrower count.
At a glance
Four things to know about Testagen
How much, and do you cycle it?
The range, and whether you take breaks.Research only, daily, in 10-20 day courses. Daily for 10 to 20 days, then a long break Community practice
The whole family is used in short courses repeated a few times a year. That pattern comes from Russian practice, not from a trial comparing it against anything else.
Nothing publishedNo figure
No half-life has ever been published for any of the Russian bioregulator peptides, in people or in animals. The research behind them, mostly from one group in St Petersburg, measures effects on tissue, gene activity and lifespan. None of it measures how long the peptide stays in the body.
You can compare this against the whole library to see where it sits.
How do I dose and price it?
Enter your vial and your dose. Pick a mix. We show the draw and the cost.The vial holds a fixed amount of drug. Adding more water does not make more drug, it just spreads it thinner, so you draw a bigger number on the syringe for the same dose.
Choose your mix
Measuring the water1 mL = one full 100-unit syringe.
Testagen starts at $29.00 across 17 vendors, typically $2.50 – $4.00 per mg.
19 listings, last read Oct 11, 2026. Shipping and card fees are not included.
How do you store it?
Before mixing, and after.Dry powder in the freezer or fridge. Once mixed, fridge, and use within about a month.
Unmixed lyophilized Testagen keeps for a long time cold. Once you add water the clock starts: most reconstituted vials hold up for roughly 28 to 30 days at fridge temperature. Keep it out of light, and do not freeze it after mixing.
What are the side effects and cautions?
Known cautions and warnings for this compound.Sold beside Testoluten, the animal-tissue extract aimed at the same organ. Different products, and the evidence does not transfer between them.
Who should avoid it
- Pregnancy or breastfeeding
- Active cancer, as a precaution given the claimed effect on gene activity
- Known allergy to it
Stop and get help
- Signs of an allergic reaction such as face or throat swelling, hives, or trouble breathing
- Redness, heat, or pus where it was injected
Common effects
- Injection-site reactions
- Generally reported as well tolerated
- No controlled human trial has recorded side effects
Where this page says nothing is established, that means nobody has studied it, not that a compound is safe.
Is Testagen approved?
And where the numbers on this page come from.No. Testagen is not approved for any use, anywhere. It is sold labeled for laboratory research only, and there is no legal route to buy it for human use.
- Approval statusResearch only
- RouteUnder the skin, or by mouth
- Checked14 August 2026
- DoseFrom community reports. No regulator or trial established this dose.
- Vial sizeFrom what vendors typically list; not a recommendation.
- SourcesNone traced yet.
What has happened recently
We have not yet written a full regulatory note for this compound. The status above is current as of the date shown.
You can compare this against the whole library, or read how to check a seller.
What else is like Testagen?
Others in Sexual and hormonal, side by side.If you're weighing Testagen, it's worth reading HMG (Menotropin), Triptorelin, and Anastrozole in the same class.
A lab-made 4 amino acid peptide aimed at the testes.
- Dose
- Research only
- How often
- Daily, in 10-20 day courses
A fertility hormone shot that drives sperm or egg production.
- Dose
- 75 up to 150 IU per dose (start low, increase slowly)
- How often
- Several per week
An FDA-approved hormone drug for prostate cancer, sold by research vendors for something else entirely.
- Dose
- Set by an FDA label
- How often
- Monthly to six-monthly depot
An aromatase inhibitor approved for postmenopausal breast cancer.
- Dose
- 1 mg per day
- How often
- Daily
Guides for this compound
- How to Reconstitute a Peptide
Mix peptide powder with bacteriostatic water, step by step.
- How to Read an Insulin Syringe
Read the units, convert to millilitres, and draw the exact dose.
- mcg vs mg: The Peptide Dosing Mistake to Avoid
Your vial says mg and your protocol says mcg. Here is the conversion and how to check it.
- Why Does My Peptide Injection Itch or Welt
Injection-site irritation, a histamine reaction, or a true allergy, and how to tell them apart.
- How to Read a Peptide COA
What the purity number does and does not tell you, and how to spot an edited report.
Sources
No primary source has been traced for this compound yet. Treat everything on this page as unverified until one is. How we grade evidence
Beyond these, 12 records are indexed. Browse the records