Thymalin_Dosage, benefits & legal status
A thymus peptide taken in courses to refresh immune function and aging.
Common vial size is what vendors typically sell, not a recommendation. Enter your own vial in the calculator.
What is Thymalin?
Plain language first. The technical label stays, but it never stands alone.Overview
It is taken in short courses to refresh immune function and support healthy aging. Western human evidence is limited.
Thymalin is a peptide extract from the thymus, the gland that trains your immune system.
What it's used for
A thymus bioregulator taken in short courses to refresh immune function and support healthy aging. It is popular in longevity circles.
How does Thymalin work?
What it does in the body, and where.Thymalin is an extract from the thymus, the gland that trains immune cells and shrinks progressively from adolescence onward.
- 01It supplies thymic peptidesThe premise is that supplying what an aging thymus no longer makes restores some immune function.
- 02Long-term Russian follow-up exists but is not independently replicatedIncluding reported mortality data from elderly cohorts, published by the originating institute and not reproduced elsewhere.
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.
- Refreshing immune function with age, taken in short coursesResearch only
- Healthy agingResearch only
The published record
Papers and trials about Thymalin
Searched: Thymalin.
156 papers tagged human · 145 not reviews or lab · 12 clinical trial publications
Furthest stage reached: Published trials only, 12 clinical trial publications, no phased trial registered
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 Thymalin
How much, and do you cycle it?
The range, and whether you take breaks.5 up to 10 mg per day (start low, increase slowly), 10-day courses. Taken in 10-day courses Community practice
Course dosing is how this one is normally used. Where the course length comes from is the thing to check: for most compounds in this pattern it is convention rather than a tested schedule.
Not establishedCommunity practice
A Russian registered product, but no pharmacokinetic study has been published. The 30 minutes quoted online traces to no source.
Not yet traced to a primary source.
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.
Thymalin starts at $19.00 across 44 vendors, typically $2.50 – $6.50 per mg.
49 listings, last read Oct 24, 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 Thymalin 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.Who should avoid it
- No formal Western contraindications established
- Pregnancy
- Immunosuppressive therapy, as a precaution
Stop and get help
- Signs of an allergic reaction
- Worsening of an autoimmune condition
Common effects
- Reported as well tolerated in Russian studies
- No modern Western controlled trials exist
Where this page says nothing is established, that means nobody has studied it, not that a compound is safe.
Is Thymalin approved?
And where the numbers on this page come from.No. Thymalin 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 (subcutaneous)
- Checked22 July 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 Thymalin?
Others in Immune support, side by side.If you're weighing Thymalin, it's worth reading Vilon, Thymulin, and Thymogen in the same class.
A thymus peptide taken in courses to refresh immune function and aging.
- Dose
- 5 up to 10 mg per day (start low, increase slowly)
- How often
- 10-day courses
A tiny bioregulator taken in courses for immunity and aging, with thin evidence.
- Dose
- Varies (course-based)
- How often
- Courses
A thymus peptide studied for immune balance and calming inflammation.
- Dose
- 1 mg per dose
- How often
- Daily/weekly
A short immune bioregulator taken in courses, with thin evidence.
- Dose
- Varies (course-based)
- How often
- 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
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, 243 records are indexed. Browse the records