Not medical advice. Talk to your provider before using any peptide.
Full disclaimerPeptide Schedule Research TeamReviewed Apr 20266 Citations
Follistatin-34417 residues (approx.)GNCWLRQAKNGRCQVLYEach bubble = one amino acid. Size = residue mass. Color = chemical class.Uses closest standard amino acids for non-standard residues.Turns your vial size, BAC water, and dose into exact syringe units. Free, no signup.
Adjust vial, water, and dose — answer updates live
All three take the same units for the same dose. A smaller barrel just spreads it over more space.
on a U-100 syringe for a 100mcg dose
Add 1 mL BAC water to your 1 mg vial. Draw to 10.0 units on a U-100 syringe for a 100mcg dose. This vial will last 10 doses.
Copy link saves these numbers in the address. Anyone who opens it sees the same draw.
Never miss a dose — 100mcg daily, draw 10.0 units on U-100 syringe.
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Follistatin-344 traps myostatin to remove the body's built-in cap on muscle growth. Animal data is dramatic (up to 327 percent gains), but the injectable form lasts only 90 minutes per dose. A documented vision risk and roughly 50 percent product mislabeling rate make this a higher-risk research peptide.
View side effects and safety warnings →
| Level | Dose / Injection | Frequency |
|---|---|---|
| Beginner | 100mcg | Daily |
| Moderate | 200mcg | Daily |
| Aggressive | 200mcg | Daily |
Reconstitution math for a 1 mg vial with 1.0 mL bacteriostatic water: each 0.1 mL (10 units on a U-100 insulin syringe) equals 100 mcg. Beginner dose is 10 units. Moderate dose is 20 units. Aggressive dose is 30 units. Product authenticity is the thing most beginners miss with this peptide. Around half of commercial FS-344 samples have tested as mislabeled. Real recombinant follistatin runs about $4,600 per mg from scientific-grade suppliers; research vendors sell it for $107 to $160 per mg. That gap should raise questions. Only buy from vendors with independent, batch-specific HPLC or mass spectrometry COAs. Generic certificates from the vendor itself are not verification. Cycle 2 weeks on, 4 weeks off. Daily injection is required because the half-life is only 90 minutes; you can't skip days and expect accumulation. Insulin syringe (29 to 31 gauge) for accuracy at these volumes. Reconstitute by rolling the vial gently. Do not shake. Store reconstituted product at 2 to 8 degrees Celsius and use within 14 days.
Dosing based on Dose extrapolated from primate studies and gene therapy research; no human clinical dosing established — 11 published references.View all sources →
Based on a 1mg vial, 1mL of bacteriostatic water, the beginner dose (100mcg), and a U-100 syringe. Change any input in the calculator and every line moves with it.
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Pricing updated 2026-04-09
Prices are estimates and vary by source, location, and prescription status.Full pricing breakdown →
Disclaimer: This curve is a simplified first-order exponential decay model. Actual pharmacokinetics vary based on injection site, individual metabolism, body composition, and other factors. Half-life values are approximate and based on available preclinical and clinical literature. Many research peptides lack formal human pharmacokinetic studies. This is for educational purposes only — not medical advice.
