Peptipedia
HormonalNot FDA ApprovedClinical Trials

Follistatin

Also known as FST, FS344, FS315

A naturally occurring protein that inhibits myostatin. Studied for muscle growth and dystrophy conditions.

Investigational - Gene therapy trials
CompareFind Vendors

Regulatory Pathway

Preclinical
Phase I
Phase II
Phase III
Phase IV
Approved

Dosing Protocol

Typical Dose

100-300 mcg daily

Frequency

Daily

Duration

Variable protocols

Community-reported dosing. Individual results vary. Not a medical recommendation.
Typical community protocol: 100-300 mcg daily via Subcutaneous injection, Daily. Dose range: 100-300 mcg daily. Duration: Variable protocols.

Timing & Administration

Administer via Subcutaneous injection. Frequency: Daily.

Mechanism of Action

Binds and neutralizes myostatin, a protein limiting muscle development. Permits enhanced muscle growth while also affecting activins and FSH release.

Research Summary

Evidence level: clinical trials. Clinical status: Investigational - Gene therapy trials.

Side Effects & Safety

Important Warnings

  • Product quality concerns with black market sources
Muscle soreness
injection site reactions
flu-like symptoms
slight LDL cholesterol elevation
potential FSH suppression

References

No references available.

Related Peptides

Browse all →
KisspeptinHormonal

A neuropeptide that plays a critical role in initiating puberty and regulating the reproductive hormone axis.

View profile
MOTS-cHormonal

A mitochondria-derived peptide that regulates metabolic homeostasis, discovered in 2015 and studied for insulin sensitivity, exercise capacity, and aging effects.

View profile
OxytocinHormonal

A naturally occurring peptide hormone essential for social bonding, childbirth, and lactation. Under investigation for autism, anxiety, and social disorders.

View profile