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Attribute
SARM / Follistatin Inducer
YK-11
SummaryHybrid SARM/myostatin inhibitor — strong anecdotal hypertrophy.
MechanismSelective androgen receptor partial agonist that upregulates follistatin.
Top outcomes
  • Lean muscle70
Evidenceanecdotal
Half-life~6-10 hours
Administrationoral
Legal statusresearch only
SafetyPossible hepatotoxicity and HPTA suppression.
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