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Follistatin 344

Works not by pressing the accelerator but by taking the brake off.

PropertyValue
TypeProtein, 344 amino acids
TargetMyostatin and related growth factors
Research fieldMuscle mass, muscle disease
Research statusPreclinical
FormFreeze dried powder

What it is

Myostatin is a protein that holds back muscle growth; animals naturally lacking it carry strikingly more muscle. Follistatin binds myostatin and so takes it out of circulation.

How it works

By removing the brake rather than adding a growth signal. Follistatin binds not only myostatin but related growth factors too, which makes its action broader than muscle alone.

What the research shows

It is one of the best known models in muscle research, with striking results in animals. In humans the evidence is limited, and the broader action makes it harder to steer than the name suggests.

Research status

Preclinical.

Practical

A large protein: sensitive to heat and to repeated thawing. Do not shake when dissolving.

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What this site is and is not
This site explains what the scientific literature says about peptides. It is not medical advice and not a set of instructions. The substances discussed here are research compounds: they are not approved for use in humans or animals. If you have a health question, see a doctor.

Updated 2026-10-03

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