Follistatin 344 3 mg peptide pen
The myostatin-binding protein at three milligrams, the smallest fill in the catalogue, priced like the complex synthesis it is, for the muscle-research corner.
- ISO-certified laboratory
- COA per batch, ≥99% HPLC
- Discreet dispatch within 24 h
- Research use only
Small fill, heavy molecule
Follistatin 344 is no tripeptide: a large, structurally demanding molecule whose synthesis cost dominates its price. Three milligrams reflects both that economics and how sparingly the research that uses it actually doses material.
Its interest comes from binding myostatin, the brake on muscle growth, which makes it the catalogue’s most direct entry in that conversation, and one where the animal-model ceiling deserves stating up front, a ceiling the compound page keeps in view.
| Compound | Follistatin 344 |
| Content | 3 mg, pre-filled |
| Mechanism | Myostatin binding |
| Purity | ≥ 99% (HPLC) |
| Evidence base | Animal models |
| WADA | Prohibited class |
| Category | Research use only |
The price per pen is the catalogue’s steepest per milligram, synthesis complexity, not margin.
Before the Follistatin 344 3 mg peptide pen reaches the bench
Small cartridge, standard rules, with extra care for a molecule this fragile.
From the forum, to the bench
Claims about this protein rarely survive contact with a controlled protocol.
Most of what circulates about a follistatin 344 pen skips the step that matters: moving a claim from an anecdote to a measured result. Threads tend to treat myostatin binding as a settled promise, when the record behind it is a body of animal-model findings whose ceiling has not been cleared in humans. At the bench the question narrows usefully, what a defined quantity of this myostatin-binding protein does under controlled, logged, repeatable conditions, not what a forum hopes it does. Where that ceiling leaves the rest of the shelf is the subject of the muscle-research area page.
That reset also changes the sense of scale. Because the molecule is large and costly to synthesise, and controlled studies consume it sparingly, the cartridge holds just three milligrams, the smallest fill in the catalogue, and still more than a careful protocol needs. It is worth keeping this material separate from the gene-delivery work that shares the follistatin name: that approach introduces a gene, this is the protein itself, and a finding in one does not transfer to the other.
A fragile molecule, kept cold
A protein this large is only as good as its cold chain.
Unlike the short peptides on neighbouring shelves, Follistatin 344 is a large, folded protein, and folded proteins are the first to degrade when a cold chain slips. Keep the pen refrigerated from arrival, never freeze it, and spare it light and repeated warming, each thaw is a chance for the molecule to lose the shape its activity rests on, which is the argument the stability page makes at length. The three-milligram cartridge is physically small, yet the handling it demands runs larger than its size suggests.
Once the pen is first used, the in-use clock starts: date the barrel and return the cartridge to the fridge between sessions. With only three milligrams present, most protocols finish the pen well before any storage limit becomes the deciding factor, so the fill is consumed inside its cold-stored window. On arrival, check the package came in cold rather than warm, for a molecule this delicate, that first hour counts as much as the certificate.
The muscle shelf
The secretagogue route to the same research area, at gentler prices.
The science behind Follistatin 344
Mechanism, area and the anti-doping line.
Questions about the Follistatin 344 3 mg peptide pen
For the smallest, priciest fill we sell.