Follistatin Explained: Can You Really Remove the Muscle-Growth Brake?

Follistatin can bind myostatin—one of the body's major restraints on skeletal-muscle growth. Animal studies are dramatic, and small human gene-therapy studies have produced encouraging signals in serious muscle disease.

But is a vial labeled "Follistatin-344" equivalent to the therapy used in those trials?

John Garrett explains FST288, FST315, and FST344; the myostatin/activin pathway; the difference between gene therapy and recombinant protein; the evidence for muscle size versus function; and the key safety and product-identity questions.

Follistatin is not an FDA-approved muscle-building medication. Educational content only; not medical advice.

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