TB-500 15 mg peptide pen
The thymosin beta-4 fragment at fifteen milligrams, pre-filled, and labelled as the fragment it is, because the full protein is a different molecule and our certificate says which one you get.
- ISO-certified laboratory
- COA per batch, ≥99% HPLC
- Discreet dispatch within 24 h
- Research use only
The actin fragment, correctly named
This pen carries TB-500: the short fragment of thymosin beta-4 associated with actin binding and cell migration, not the 43-residue parent protein this market routinely confuses it with. The distinction is on the certificate, where it belongs, and the TB-500 compound file explains how fragment and parent came to share a name.
Its research context is cardiac, corneal and dermal injury models, a different corner of the repair literature from BPC-157’s tendon-and-gut work, which is exactly why the two are so often ordered together and so wrongly treated as interchangeable. Those injury models are best found through the thymosin beta-4 search on PubMed, filed under the parent protein’s name rather than the market one.
| Compound | TB-500 (Tβ4 fragment) |
| Content | 15 mg, pre-filled |
| Parent protein | Thymosin beta-4, 43 residues |
| Purity | ≥ 99% (HPLC) |
| Human trials | None published |
| WADA | On the prohibited list |
| Category | Research use only |
If a protocol requires the full protein rather than the fragment, we are not the supplier, and we say so rather than substitute.
Before the TB-500 15 mg peptide pen reaches the bench
The standard pen regimen, cold and dated.
From our fridge to yours, the clock in between
A fragment this size lives or dies on temperature, so the storage rhythm is the protocol behind the protocol.
Cold is not a suggestion for this compound; it is the difference between usable material and a slow write-off. Researchers who buy tb-500 pen stock are handling a short peptide fragment that degrades faster than a robust small molecule, so the cold chain that begins in our fridge has to continue unbroken in yours. Refrigerate on arrival, and never freeze, a freeze-thaw cycle can shear a fragment like this in ways no purity certificate issued beforehand will have warned you about, for the reasons the freeze-thaw page sets out.
The rhythm matters most after the first needle goes in. Puncturing the cartridge starts a shelf-life clock that the sealed dating no longer governs, so mark that date on the barrel and let it, not the original expiry, set your window. Between sessions the fifteen-milligram cartridge goes straight back to the fridge; brief minutes at room temperature to dial and inject are unremarkable, but a pen left out overnight has spent stability you cannot get back.
Beside the repair names, apart from the protein
Read this pen by its company: the compounds it stands next to define it as much as its own data.
On the recovery shelf this fragment’s closest neighbour is BPC-157, and a lab that runs both tends to hold them side by side. That proximity is where care is needed. The two share a cold regimen and a reputation for tissue work, but not an evidence base, a sequence, or a mechanism, and a shared shelf makes it easy to let one certificate stand in for the other. Keep their batch documents and session logs separate from the start.
The more dangerous neighbour is conceptual: the full-length thymosin beta-4 protein, a different and larger molecule that the market routinely files under the same name. Our certificate names the fragment supplied, precisely so the two never blur on your shelf. Two further markers set this pen apart from its company, it appears only among the pre-filled pens, without the capsule route some neighbouring compounds take, and it carries no published human trials while sitting on the WADA prohibited list. Position it accordingly.
Ordered alongside
The other half of the most-discussed pairing in this field.
The science behind TB-500
Naming, mechanism and comparison, the three pages that matter here.
Questions about the TB-500 15 mg peptide pen
The recurring three for this pen.