Follistatin 344
Also known as: FST-344, Follistatin
preclinical onlyWADA bannedNot FDA approvedResearch only
Published Dose Range
Low100 mcg/dose
Typical100-200 mcg every other day
High300 mcg/dose
No published human trials. Dosing is extrapolated from animal data and anecdotal use.
Published Cycle Range
No published cycle data available.
Administration
Routessubcutaneous, intramuscular
FrequencyEvery other day
Limited to no published timing guidance.
Safety Profile
Contraindications
- • Cancer history
- • Any condition requiring myostatin regulation
Common side effects
- • Injection site reactions
- • Unknown — very limited human data
Serious risks
- • Myostatin inhibition long-term effects unknown
- • Potential cardiac/tendon structural concerns (theoretical)
Requires monitoring
- • CK
- • Cardiac function if used long-term
Pregnancy / breastfeeding
No data — consult clinician
Common Misconceptions
- Not a shortcut to myostatin-knockout physique — human response is far smaller than animal data suggests
Next Steps
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