Thymalin/Thymulin is sold here for laboratory research, in 1 size (10mg), starting at $80.00 a vial. Every batch arrives with a certificate naming the test that identified it, the test that measured its purity, and the date each was run. It is not an FDA-approved medicine. Research use only, and never for people or animals.
Thymalin specifications
| Product name | Thymalin/Thymulin |
|---|---|
| Also sold as | Thymalin/Thymulin |
| Formula | C33H54N12O15 |
| Physical form | Freeze-dried powder — a solid cake in a sealed vial |
| Appearance | White to off-white cake |
| Sizes on this page | 10mg |
| Purity specification | ≥99% by RP-HPLC. The number for the lot you receive is whatever its own certificate says. |
| Identity check | Mass spectrometry, read against the mass this compound should have |
| Net content | Weighed per lot and reported separately from purity |
| Lot documentation | At the laboratory — each certificate posts here the day it clears |
| Storage | Sealed, cold and out of the light |
| Ships from | Santa Ana, California — same business day on verified in-stock orders placed before 12 PM Pacific |
| Intended use | Laboratory research only. Not for human or animal use. |
What is Thymalin, and what is it used for?
Thymalin is also listed and searched as Thymalin/Thymulin. They all mean the same compound. Supplier lists write it as Thymalin peptides or peptide Thymalin as well; every one of those is this record. A name is not a test, which is why the lot record further down counts for more than the wording on a label.
Chemically: molecular formula C33H54N12O15, average mass 858.9 g/mol (PubChem CID 71300623). Those figures are what the identity test on a certificate is read against.
A product name covering two distinct substances: Thymalin, a thymus-derived peptide preparation from the Khavinson series, and thymulin, a characterised zinc-dependent nonapeptide thymic hormone. These are not the same thing.
Depends entirely on which substance is in the vial. Thymulin has a defined mechanism as a zinc-dependent thymic hormone produced by thymic epithelial cells, with biological activity strictly requiring bound zinc. Thymalin is a peptide preparation extracted from thymus tissue rather than a single defined molecule, and has no established mechanism.
Thymulin appears in a mainstream international immunology literature dating from the 1970s and 1980s. Thymalin appears in the Russian bioregulator literature, principally around immune parameters in ageing.
Which substance a vial under this name contains is not established by the name. No approved product exists under either name in the United States or European Union, and for a preparation rather than a defined molecule, purity and identity testing cannot mean what it means for a single compound.
Thymalin for sale: 10mg vials, price per mg
Thymalin is sold in 1 size here, 10mg, from $80.00 a vial. The per-mg column is the honest comparison between sizes; the two tier columns show what ten and twenty vials of one size bill at, because the volume discount is per size and mixed sizes do not combine.
| Size | One vial | Per mg | 10 vials −10% | 20 vials −15% | Availability |
|---|---|---|---|---|---|
| Thymalin 10mg | $80.00 | $8.00 | $720.00$7.20/mg | $1,360.00$6.80/mg | Backordered — waitlist |
Thymalin discounts: bulk pricing, Subscribe & Save, and codes
Three things move this price and nothing else does: how many vials of one size are on the order, whether that order repeats, and one code. The fourth column prices each route against the 10mg vial.
| Buying option | Takes off | When it applies | 10mg at this option |
|---|---|---|---|
| One vial, one time | — | Any order | $80.00 |
| 10–19 vials of one size | 10% | This order | $720.00$72.00 a vial |
| 20 vials of one size | 15% | This order | $1,360.00$68.00 a vial |
| Subscribe, every 1 month | 6% | Shipment 2 onward | First $80.00, then $75.20 |
| Subscribe, every 2 months | 4% | Shipment 2 onward | First $80.00, then $76.80 |
| Subscribe, every 3 months | 2% | Shipment 2 onward | First $80.00, then $78.40 |
| 10 vials on a monthly subscription | 10%, then 6% more | Shipment 2 onward | First $720.00, then $676.80 |
| Sign-up code | 10% of the order | One use, dead 24 hours after signup | $72.00 for one vial |
| Friday newsletter code | 5% of the order | Live 24 hours, a new one each Friday | $76.00 for one vial |
| On-site offer code | 5% of the order | Live 30 minutes from when it appears | $76.00 for one vial |
| Free standard shipping | The shipping charge | Orders over $200 | 3 vials |
The first three stack; the codes do not. A volume discount comes off the line, a subscription cadence comes off that same line from shipment 2, and one code comes off what is left. One code per order, never two. A subscription runs a minimum of two shipments and can be cancelled once the second has shipped, and the first shipment always bills at today's eligible price with no cadence discount on it. The lowest this record ever bills is $6.39 per mg: twenty 10mg vials on a monthly subscription, from shipment 2 onward.
Every figure above is what you pay; nothing is added at checkout — dispatch and delivery work the same on every order.
Where to buy Thymalin: five checks before you order from anyone
Thymalin for sale, or Thymalin peptide for sale, means this page: one record, 1 size, a lot certificate for each. You can buy Thymalin online here with guest checkout; verified in-stock orders placed before 12 PM Pacific are dispatched the same day.
Run these on us too. A supplier who cannot pass them is asking you to take their word for it, and their word is the one thing a certificate exists to replace.
- Check the certificate on the lab’s own site, not ours.
- See whether it was written for the seller.
- Match the lot number on the paper to the one on the vial.
- Look for a method and a date next to every number.
- Make sure identity was tested, not assumed.
Each of those is worked through, with what a failed check actually looks like, on verifying a certificate.
Thymalin vs Epithalon and Thymosin Alpha-1: different molecules, separate records
Thymalin vs Epitalon, or Epitalon vs Thymalin, is the comparison people search most, with Thymosin Alpha 1 close behind, and they are not the same thing. Each is a different molecule with a different formula, mass and research record, and each has its own certificate here.
Epitalon vs Thymalin: the same comparison, side by side
| Record | Class | Formula | Avg. mass | Sizes here |
|---|---|---|---|---|
| Thymalin/Thymulin | A product name covering two distinct substances: Thymalin, a thymus-derived peptide preparation from the Khavinson series, and thymulin, a characterised zinc-dependent nonapeptide thymic hormone. | C33H54N12O15 | 858.9 | 10mg from $80.00 |
| Epithalon | A man-made peptide of four building blocks. | C14H22N4O9 | 390.35 | 10mg · 50mg from $40.00 |
| Thymosin Alpha-1 | A 28-residue acetylated peptide originally isolated from thymic tissue; the pharmaceutical form is called thymalfasin. | C129H215N33O55 | 3108.3 | 5mg · 10mg from $70.00 |
The Thymalin certificate: lot, purity, identity, and how to verify it
A certificate answers identity, purity and net content as three separate questions, each with the method that produced it and the date it was run — how to read one covers what each field does and does not cover. For Thymalin that means a mass spectrum landing on 858.9 g/mol for C33H54N12O15, the figure published against PubChem CID 71300623.
Listings elsewhere describe Thymalin/Thymulin as an acetate, an arginate salt or an N-acetyl form. Those are different chemical forms with different masses, and a certificate identifies which one was actually tested. The form of the lot on this page is whatever its certificate states; it is not assumed from a listing name, ours included.
The certificate below belongs to one lot, and its number matches the one printed on the vial you receive. A real report for a different batch is still the wrong report.
| Size | Lot | Identity method | Purity | Test date |
|---|---|---|---|---|
| 10mg | Pending verification | Pending verification | Pending verification | Pending verification |
No lot documentation is published for Thymalin/Thymulin yet. Rather than display a placeholder certificate, this record shows the gap until each field has been verified against the lot in hand. The certificate index lists every lot the moment its report clears.
Solution arithmetic for the bench, with no administration guidance: the vial concentration calculator, preset to Thymalin/Thymulin.
Where the FDA stands on Thymalin
The FDA has not approved this compound for anything, and nothing in this catalogue is a medicine. Where a compound stands legally depends on what it is, what form it is in, what it is being used for and which country you are in, and it changes over time, so the status shown here carries the date it was last checked.
Status verified 2026-08-25. Regulatory positions move; check the primary source before relying on any summary, including this one.
It is sold here as laboratory material under the research-use restriction that closes this page, which is not an approval, and not a statement that the compound is safe, effective or right for any purpose.
Thymalin research: what the published studies examine
Status: No FDA-approved application. This compound is sold as laboratory material. Where research on it has been published, it sits at the animal, cell or early-human stage, and this record does not summarise what it found. A supplier is not a neutral judge of evidence about its own catalogue.
The most important thing on this page is that the label covers two different substances. Thymulin is a nonapeptide hormone produced by thymic epithelial cells whose biological activity is strictly dependent on zinc bound within the molecule — antibody and NMR work established that the zinc-coupled form has a distinct conformation, and antibodies raised against it discriminate between the zinc-bound and zinc-free molecule. That is characterised pharmacology from mainstream immunology.
Thymalin is something else: a peptide preparation extracted from thymus tissue in the Khavinson series, a mixture rather than a single sequence, with the same provenance limitations as the rest of that series. A defined nonapeptide and a tissue extract are not interchangeable, and no certificate of analysis can resolve the ambiguity created by putting both names on one product — a purity figure for a mixture does not mean what a purity figure for a single peptide means.
| Reported observation | Model | Source |
|---|---|---|
| Thymulin is a nonapeptide produced by thymic epithelial cells whose biological activity is strictly dependent on the presence of zinc in the molecule. Monoclonal antibodies raised against synthetic and natural forms recognised exclusively the zinc-coupled molecule, while other antibodies recognised a zinc-independent epitope, indicating a zinc-specific conformation consistent with NMR studies. | monoclonal antibody and immunofluorescence characterisation, human and mouse thymic epithelial cells | Dardenne, Savino, Berrih and Bach, A zinc-dependent epitope on the molecule of thymulin, a thymic hormone, Proceedings of the National Academy of Sciences (1985)This describes THYMULIN, the defined hormone — not Thymalin, the extract. |
| The originating review of the Khavinson series describes Thymalin as a thymic peptide preparation whose most prominent reported effects relate to stimulation of immunity, associated in that work with anticarcinogenic and geroprotector activity. | review of the originating group's own work | Khavinson, Peptides and Ageing, Neuroendocrinology Letters (2002)This describes THYMALIN, the preparation — not thymulin. The two literatures do not overlap. |
Open questions. Start with the ambiguity, because it is not a labelling quibble. Thymulin is a defined nonapeptide requiring bound zinc for activity; Thymalin is a tissue-derived preparation. They have separate literatures, separate origins and separate degrees of characterisation, and a buyer cannot tell from this name which they are getting. Anyone purchasing under this label should establish which substance is intended before anything else, and should understand that if it is the preparation, identity and purity testing cannot answer the same question it answers for a single compound.
Beyond that, the thymulin literature is largely from the 1970s and 1980s and its zinc dependence means the peptide alone, absent zinc, is not the active species — a point that bears directly on what a vial of lyophilised peptide actually contains. The Thymalin literature carries the provenance limitations of the whole Khavinson series.
Each row above describes an observation in the stated model. None of it describes what Thymalin/Thymulin would do in a person or an animal outside that model, and none of it is a recommendation to use it for anything.
Questions about Thymalin
Where to buy Thymalin Peptide, and can I get it online?
How much does Thymalin Peptide cost?
What is the cheapest way to buy Thymalin Peptide?
What is Thymalin/Thymulin used for?
What is the difference between Thymalin/Thymulin and Epithalon?
What is Thymalin peptide?
How do I verify the certificate of analysis is real?
FOR LABORATORY AND IN-VITRO RESEARCH USE ONLY. NOT FOR HUMAN OR ANIMAL CONSUMPTION. NOT FOR PERSONAL, MEDICAL, DIAGNOSTIC, THERAPEUTIC, OR RECREATIONAL USE.
