Thymogen_Dosage, benefits & legal status
Also known as Glu-Trp, EW, Thymagen, glutamyl-tryptophan
A short immune bioregulator taken in courses, with thin evidence.
Common vial size is what vendors typically sell, not a recommendation. Enter your own vial in the calculator.
What is Thymogen?
Plain language first. The technical label stays, but it never stands alone.Overview
It is taken in courses to support immune function, but there is very little real human research behind it.
Thymogen is a 2-amino-acid thymus 'bioregulator' from the Russian Khavinson family.
What it's used for
A short immune bioregulator taken in courses to support immune function.
How does Thymogen work?
What it does in the body, and where.Thymogen is two amino acids, glutamic acid and tryptophan, from the thymus branch of the Khavinson family.
- 01The claim is immune supportGiven in short courses, sometimes nasally.
- 02Evidence is Russian-language and unreplicatedNo independent Western trial.
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 immune function, taken in coursesResearch only
The published record
110
Records indexed for Thymogen
49 in humans, 40 of them original studies.
1 registered trials, 0 with posted results.
Counted from Europe PMC indexing, not read by a person. Human means indexed under humans, which includes reviews and work on human cells. Original studies exclude reviews and lab work on human cells.Last updated 12 September 2026.
At a glance
Four things to know about Thymogen
Evidence
Research only
Category
Immune support
Common vial
10 mg
Half-life
Nothing published
How much, and do you cycle it?
The range, and whether you take breaks.Varies (course-based), courses. Courses of 10 to 20 days, repeated two or three times a yearCommunity practice
The course structure is how the Khavinson protocols specify these and how they are sold. No trial has compared course dosing against continuous use, or established how long the gap between courses should be.
How long does it stay in the body?
The half-life, and where the figure comes from.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.
Your draw
0 / 100 unitsThymogen starts at $29.00 across 6 vendors, typically $2.95 – $5.95 per mg.
6 listings, last read Sep 5, 2026. Shipping and card fees are not included.
How do you store it?
Before mixing, and after.Fridge after opening. Use within about 30 days.
Store sealed Thymogen in the fridge. Once opened, keep it upright in the fridge and plan to finish it inside roughly 30 days. Keep it out of light and do not freeze the liquid.
What are the side effects and cautions?
Known cautions and warnings for this compound.Who should avoid it
- No formal Western contraindications established
- Pregnancy
- Immunosuppressive therapy, as a precaution
Stop and get help
- Signs of an allergic reaction
Common effects
- Limited published safety data from Russian clinical use
- No Western controlled trials exist
Where this page says nothing is established, that means nobody has studied it, not that a compound is safe.
Is Thymogen approved?
And where the numbers on this page come from.No. Thymogen is not approved for any use, anywhere. It is sold labelled for laboratory research only, and there is no legal route to buy it for human use.
- Approval statusResearch only
- RouteUnder the skin or as a nasal spray
- CheckedJuly 2026
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.
- DoseFrom research and community reports. No regulator has reviewed this dose.
- Vial sizeFrom what vendors typically list; not a recommendation.
- Sources
- Reviewed22 July 2026
What else is like Thymogen?
Others in Immune support, side by side.If you're weighing Thymogen, it's worth reading Thymopentin (TP-5), Imunofan, and Crystagen in the same class.
A short immune bioregulator taken in courses, with thin evidence.
- Dose
- Varies (course-based)
- How often
- Courses
Five amino acids that carry the whole activity of a thymus hormone.
- Dose
- 50 mg per dose
- How often
- 3x per week
A Russian rework of thymopentin, with one amino acid added at each end.
- Dose
- 50 mcg per dose
- How often
- Every other day, in courses
A lab-made 3 amino acid peptide aimed at the immune system.
- Dose
- Research only
- How often
- Daily, in 10-20 day courses
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.
- How to Read a Peptide COA
What the purity number does and does not tell you, and how to spot an edited report.
- How to Vet a Peptide Vendor
Independent COAs, HPLC purity, and the red flags that mean walk away.
Sources
- Avolio et al., Peptides Regulating Proliferative Activity and Inflammatory Pathways in the Monocyte/Macrophage THP-1 Cell Line (International Journal of Molecular Sciences 23:3607)(2022)Thymogen is the dipeptide Glu-Trp, separated from the thymus extract Thymalin by chromatography, and in this experiment it was the strongest performer on one specific measure: it cut the adhesion of monocytes to inflamed endothelial cells almost to the level of uninflamed control, and it was the most effective of the five at reducing IL-17 release. It also increased proliferative signalling and reduced TNF and IL-6. Two limits belong on this alongside the result. Everything here is a human leukemia cell line incubated overnight at 100 ng/mL, with no animal or human data, and Khavinson and two colleagues from his Saint Petersburg institute are co-authors, so this is not the independent replication this family of compounds still lacks.
Last reviewed 22 July 2026
Beyond these, 110 records are indexed. Browse the records