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Follistatin 344 1mg/vial 1 Vial by Bio-Peptide
Lab Tested

Follistatin 344 1mg/vial 1 Vial by Bio-Peptide

4.5 (2 reviews)

Follistatin-344 is a 344-amino-acid glycoprotein isoform that binds and neutralises myostatin (GDF-8), eliminating the principal molecular constraint on skeletal muscle fibre formation and making it one of the most studied experimental peptides for satellite-cell-driven muscle hyperplasia research. Bio-Peptide supplies this compound as a lyophilised research vial containing 1 mg of sequence-verified Follistatin-344 — a precise entry-point dose engineered for low-dose titration studies and flexible reconstitution-volume design in ActRIIB pathway investigations. Every vial is independently verified by third-party laboratories for HPLC purity and LAL endotoxin compliance before release, with synthesis conducted under cGMP-aligned process controls.

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  • Binds myostatin and activin A simultaneously, blocking multiple suppressors of muscle growth in a single mechanism.
  • Supports genuine muscle fibre hyperplasia research — increases in fibre number, not merely fibre size.
  • Precise 1 mg dose enables flexible reconstitution volumes for low-dose titration and dose-response studies.
  • Every batch independently verified by third-party HPLC (≥ 98 % purity target) and LAL endotoxin testing.
  • Lyophilised format preserves peptide stability during shipping and pre-use storage at 2–8 °C.
  • Sequence-confirmed Follistatin-344 isoform — the 344-amino-acid variant most studied in ActRIIB pathway research.
  • cGMP-compliant production with full chain-of-custody documentation from synthesis to final vial.

Key takeaways

  • Understand that Follistatin-344 neutralises myostatin via direct ligand binding.
  • Expect preclinical hyperplastic effects driven by satellite-cell proliferation, not hypertrophy alone.
  • Distinguish Follistatin-344's mechanism from ACE-031's engineered decoy-receptor approach.
  • Reconstitute with bacteriostatic water and refrigerate; use within 72 hours.
  • Confirm HPLC and LAL certificates before initiating any research protocol.

Follistatin-344: A Selective Myostatin Antagonist for Muscle Hyperplasia Research

Follistatin-344 is a 344-amino-acid isoform of the follistatin protein that exerts its primary biological action by binding myostatin (GDF-8) with high affinity, preventing myostatin from activating the ActRIIB receptor pathway that would otherwise limit skeletal muscle fibre number and size. Compared to ACE-031 — a pharmacologically engineered soluble decoy receptor targeting the same ActRIIB pathway — Follistatin-344 operates as an endogenous-class ligand trap, capturing myostatin at the extracellular level before receptor engagement occurs. This mechanistic distinction makes Follistatin-344 a critical reference molecule for researchers studying the upstream biology of myostatin suppression.

Mechanism: How Myostatin Blockade Drives Muscle Hyperplasia

Myostatin inhibition by Follistatin-344 relieves the transcriptional brake on satellite cell activation, enabling a genuine hyperplastic response — an increase in total muscle fibre number — rather than simple hypertrophy of existing fibres. Preclinical data published in peer-reviewed journals document lean-mass increases of 20–30 % in murine models following sustained Follistatin overexpression, with the effect attributed to both satellite cell proliferation (measured by MyoD marker upregulation) and reduced atrogene signalling (MuRF-1 and MAFbx downregulation). Follistatin-344 also binds activin A, a second TGF-β superfamily ligand associated with cachexia and muscle wasting, broadening its experimental relevance beyond pure performance contexts.

Why This Peptide Is Classified as Experimental

Follistatin-344 has not received regulatory approval as a therapeutic agent in any jurisdiction; all current use is confined to in vitro and in vivo preclinical research. The compound's potency — specifically its capacity to modulate ActRIIB ligand availability — raises safety questions around cardiovascular muscle tissue and haematological parameters that remain under active investigation. Responsible research protocols require baseline bloodwork, cardiac monitoring, and strict dosing controls. Bio-Peptide supplies this vial exclusively for research purposes, with each batch carrying independent third-party HPLC sequence confirmation (≥ 98 % purity target) and a LAL endotoxin certificate, manufactured under cGMP-compliant production standards.

Product Specification

Each vial delivers 1 mg of lyophilised Follistatin-344, the lowest available concentration in this research series, which is intentional: the 1 mg format supports precise low-dose titration studies and reconstitution-volume flexibility that higher-concentration vials cannot match. Storage at 2–8 °C (pre-reconstitution) and use within 48–72 hours post-reconstitution (refrigerated) are required to maintain peptide integrity.

Usage

  1. Pre-reconstitution check: Confirm the lyophilised cake is intact and the vial seal is unbroken; verify HPLC and LAL certificates match the batch number printed on the vial.
  2. Prepare reconstitution solution: Draw 1–2 mL of bacteriostatic water into an insulin syringe; select volume based on your target concentration (e.g. 1 mL = 1 mg/mL; 2 mL = 0.5 mg/mL).
  3. Reconstitute carefully: Insert the syringe at an angle and direct the water slowly down the inner vial wall — never inject directly onto the peptide cake, as foaming denatures the protein structure.
  4. Swirl, do not vortex: Gently rotate the vial between your fingers until the powder fully dissolves; a clear, colourless solution indicates correct reconstitution.
  5. Draw your research dose: Use a fresh insulin syringe to withdraw the calculated volume corresponding to your target mcg dose; administer subcutaneously, rotating sites to avoid tissue irritation.
  6. Post-use storage: Cap the reconstituted vial, return immediately to 2–8 °C refrigeration, and use within 48–72 hours; discard any unused solution after this window to ensure data integrity and safety.

Warnings

Contraindications:

Follistatin-344 is not approved for human therapeutic use in any jurisdiction. It must not be used by individuals with known or suspected malignancy, as follistatin expression is associated with tumour progression in several cancer lineages. Those with pre-existing cardiac conditions, haematological disorders, or reproductive hormone imbalances should avoid exposure outside formally supervised research settings.

Side Effects:

Reported findings in preclinical and observational research contexts include transient injection-site reactions, alterations in activin-mediated FSH regulation (relevant to reproductive function), and potential modulation of bone mineral density due to activin A blockade. Cardiovascular smooth-muscle effects analogous to those observed in the ACE-031 clinical suspension should be considered a theoretical risk.

Monitoring:

Baseline and on-cycle bloodwork is strongly recommended, covering: complete blood count, liver enzymes (ALT/AST), FSH/LH, cardiac troponin, and lipid panel. Any deviation in haematological or cardiac markers warrants immediate protocol suspension pending medical review.

PCT / Post-Cycle Considerations:

Because Follistatin-344 modulates activin A alongside myostatin, FSH and LH levels may be transiently suppressed. A structured post-research monitoring period of at least four weeks, including hormonal panel assessment, is advised before initiating any further research compound protocols.

Frequently asked questions

What exactly does Follistatin-344 block in the body and how does that affect muscle tissue?
Follistatin-344 binds myostatin (GDF-8) and activin A — both members of the TGF-β superfamily — preventing them from activating the ActRIIB receptor that suppresses muscle growth. By neutralising these ligands, Follistatin-344 removes the primary molecular brake on satellite cell proliferation and muscle fibre formation, enabling a hyperplastic rather than purely hypertrophic response in preclinical models.
How significant is the muscle growth effect observed with myostatin inhibition in research settings?
Preclinical studies using follistatin overexpression in murine models have documented lean-mass increases of 20–30 %, attributed to satellite cell activation (tracked via MyoD marker expression) and suppression of atrogene signalling (MuRF-1, MAFbx). These gains represent some of the largest pharmacologically induced muscle-mass changes observed in animal models, which is precisely why myostatin inhibition remains a priority research target.
Why are Follistatin-344 and ACE-031 considered experimental and not approved therapeutic compounds?
Neither compound has passed the full clinical trial process required for regulatory approval. Both modulate ActRIIB ligand availability potently enough to raise unresolved safety questions — particularly regarding off-target effects on cardiac muscle, haematopoiesis, and bone mineral density. Phase II trials of ACE-031 in Duchenne muscular dystrophy were suspended partly due to adverse vascular findings, underscoring why Follistatin-344 research must proceed under controlled, monitored conditions.
How should Bio-Peptide Follistatin-344 1mg vial be reconstituted and stored after opening?
Reconstitute the 1 mg lyophilised powder with 1–2 mL of bacteriostatic water using a slow, wall-directed injection to avoid foaming and peptide degradation. Once reconstituted, store the vial at 2–8 °C and use within 48–72 hours for optimal peptide stability. The 1 mg format allows researchers to prepare precise low-concentration solutions suited to micro-dosing protocols, a practical advantage of this entry-level vial size.
Why choose the 1mg/vial format of Follistatin-344 over higher-concentration options for research?
The 1 mg/vial concentration is the lowest available in Bio-Peptide's Follistatin series, making it ideal for pilot studies, dose-response curve work, and reconstitution-volume calibration before scaling. Researchers can prepare solutions ranging from 0.1 mg/mL to 1 mg/mL depending on experimental need, providing flexibility that a fixed high-concentration vial limits. It also reduces waste risk when establishing individual research protocols. (2) angle_used

Manufacturer

Bio-Peptide's origins trace to a gap the founders identified in the European research compound sector: a near-total absence of manufacturers willing to publish independent, third-party quality documentation alongside their products. Rather than scaling volume first and addressing quality infrastructure later, Bio-Peptide inverted that model — commissioning external laboratory verification (HPLC sequence confirmation and LAL endotoxin certification) from the outset and treating those certificates as non-negotiable product deliverables, not optional marketing additions. That founding decision shaped every subsequent operational choice: raw amino-acid sourcing is governed by documented supplier qualification, synthesis batches run under cGMP-aligned process controls, and release is contingent on passing both purity and endotoxin thresholds rather than on production timelines. The result is a manufacturer whose reputation in the research community rests on verifiable data rather than claims alone.

Product details

BrandBio-Peptide
Active ingredientfollistatin-344
Also known asFollistatin 344, FST-344, Bio-Peptide Follistatin 344
Strength1 mg
FormVial
Pack size1 piece
Item numberPEPT-FOLL-BIO-001

Reviews

4.5/5

2 reviews

  • Rating: 5 out of 5 starsachilles_4Verified purchase

    impressive lean muscle gains

    100mcg daily for 10 days as recommended. Muscles looked fuller and harder by day 5, not placebo either because my training partner noticed without me saying anything, weighed 84kg before, 86.2kg after with no fat gain visible. Clean white lyophilised powder, reconstituted perfectly with BAC water. Will run again in 3 months.

  • Rating: 4 out of 5 starsEthan76Verified purchase

    Good results but pricey

    Ran 100mcg daily for 10 days. Definitely saw muscle fullness increase and strength went up in the gym. Results are real. Only reason it's not 5 stars is the price per mg is steep, makes it hard to run regularly. That said for a short blast it delivers. Came well packaged and arrived in 5 days...

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