Follistatin 344
Also known as: FST-344
A protein studied for muscle growth via inhibition of myostatin, a natural brake on muscle size.
Follistatin 344 at a glance
| Name | Follistatin 344 |
|---|---|
| Also known as | FST-344 |
| Category | Growth & muscle |
| Type | Peptide |
| Sequence | Follistatin isoform (344 amino acids) |
| Typical dose | ~100 mcg |
| Frequency | Daily in short cycles |
| Route | Subcutaneous injection |
| Half-life | Short. |
Overview
Follistatin binds and blocks myostatin — the body’s own signal that limits how much muscle you build. By inhibiting that brake, follistatin has drawn strong research interest for muscle growth and repair, mostly in animal and gene-therapy studies.
How it’s thought to work
- Binds and neutralizes myostatin (GDF-8), releasing the natural cap on muscle growth.
- Also modulates related TGF-β family signals involved in tissue repair.
Researched uses
- Muscle growth and wasting research
- Recovery and fibrosis studies
Commonly cited protocol
| Typical dose | ~100 mcg |
|---|---|
| Frequency | Daily in short cycles |
| Route | Subcutaneous injection |
| Notes | Typically run as brief cycles in research. |
Reconstitution
Often a 1 mg vial. 1 mg with 2 mL water = 0.5 mg/mL, so 100 mcg = 20 units on a U-100 syringe.
Follistatin 344 dosage calculator
The calculator below is pre-filled with Follistatin 344’s commonly cited vial size and dose. Adjust the vial amount, bacteriostatic water, or dose to match your own vial — it will show the exact insulin-syringe units to draw, the concentration, and how many doses the vial holds.
Add 2 mL of bacteriostatic water to your 1 mg vial. That gives you about 10 doses of 100 mcg. For each dose, draw 20 units into a 100-unit insulin syringe.
See the full Follistatin 344 dosing chart (units for every dose & water amount), or open the full peptide calculator →
Cautions
- Not approved for human use; minimal human data.
- Myostatin inhibition has unknown long-term effects on the heart and tendons.
- Research chemical status.
Follistatin 344 FAQ
What is Follistatin 344?
A protein studied for muscle growth via inhibition of myostatin, a natural brake on muscle size.
How does Follistatin 344 work?
Binds and neutralizes myostatin (GDF-8), releasing the natural cap on muscle growth. Also modulates related TGF-β family signals involved in tissue repair.
What is Follistatin 344 used for?
Muscle growth and wasting research; Recovery and fibrosis studies.
What is a typical Follistatin 344 dose?
~100 mcg, Daily in short cycles, Subcutaneous injection. This is a commonly cited figure for context only, not medical advice.
How do you reconstitute Follistatin 344?
Often a 1 mg vial. 1 mg with 2 mL water = 0.5 mg/mL, so 100 mcg = 20 units on a U-100 syringe.
What is the half-life of Follistatin 344?
Short.