← Back to Library

Follistatin-344

Also known as: FS-344, FST-344

Evidence: PreliminaryRisk: Unknown
Administration:💉 SubQ💉 IM

Overview

A naturally occurring protein that binds to and inhibits myostatin, a protein that limits muscle growth. Research has explored its potential role in muscle development and metabolic regulation.

Benefits

  • muscle growth support
  • myostatin inhibition
  • body composition
  • recovery

Potential Side Effects

  • injection site reactions
  • unknown long-term effects
  • limited human safety data

Who Should Avoid

  • pregnancy or breastfeeding
  • active malignancy or cancer history
  • hormone-sensitive conditions
  • adolescents with open growth plates

Interactions & Precautions

Very limited interaction data. May affect muscle and metabolic pathways. Comprehensive endocrine evaluation essential. Unknown interactions with anabolic agents.

Dosing Information from Literature

Human clinical data is extremely limited. Animal research has used varying protocols. No standardized human dosing exists. Gene therapy approaches have also been explored.

This is descriptive information only. Always consult a licensed healthcare provider for dosing guidance.

Storage

Store unreconstituted peptide in freezer (-20°C or colder). After reconstitution, store refrigerated and use within 1 week. Highly sensitive to degradation.

Last reviewed: 11/3/2025