309 In the index

Andarine S-4

An early experimental muscle-building compound with only limited human testing behind it. What that limited testing does show is that it can cause a strange, reversible yellow tint to vision at higher doses.

Also known as S-4, GTx-007, S-4 cpd, 7UT2HAH49H, RefChem:558031, 803-892-7, SARM S-4, GTx 007, Andarine (GTX-007)

Effects Build muscle Lose fat

Routes Oral

Legal status Research chemical

WADA Banned at all times

Molecular Structure of C₁₉H₁₈F₃N₃O₆

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Chemistry

Formula: C19H18F3N3O6
Molar mass: 441.4
CAS: 401900-40-1
PubChem CID: 9824562
IUPAC name: (2S)-3-(4-acetamidophenoxy)-2-hydroxy-2-methyl-N-[4-nitro-3-(trifluoromethyl)phenyl]propanamide
InChIKey: YVXVTLGIDOACBJ-SFHVURJKSA-N

Reported dosing

User-reported

What has been reported in the literature and by users. This is a record of what is done, not a recommendation.

Typical dose 25-50 mg/day

Reported range 25-75 mg/day

Route Oral

Frequency Once or twice daily

Duration 6-8 week cycles (unregulated use)

Never completed human clinical development (S-4); commonly reported to cause reversible yellow-tinted vision at typical bodybuilding doses. No FDA approval.

Where this comes from User-reported/research-chemical vendor literature; early preclinical data

There is no approved human dosing for this compound. The figures above are what users and vendors report, not what has been established as safe or effective. Treat them as a record of what is done, not as guidance.