Androstenedione Andro

A hormone supplement once sold over the counter as 'andro' before the U.S. banned it as a controlled substance. Human studies found it raised testosterone only modestly while raising estrogen more than expected, undercutting its reputation as a muscle-builder.

Also known as 4-Androstenedione, Androst-4-ene-3,17-dione, 4-Androstene-3,17-dione, Androtex, delta-4-Androstenedione, 3,17-Dioxoandrost-4-ene, SKF 2170

Effects Build muscle

Routes Oral

Legal status Controlled substance

WADA Banned at all times

3D Molecular Structure of C₁₉H₂₆O₂

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Chemistry

Formula: C19H26O2
Molar mass: 286.4
CAS: 63-05-8
PubChem CID: 6128
IUPAC name: (8R,9S,10R,13S,14S)-10,13-dimethyl-2,6,7,8,9,11,12,14,15,16-decahydro-1H-cyclopenta[a]phenanthrene-3,17-dione
InChIKey: AEMFNILZOJDQLW-QAGGRKNESA-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 100-300 mg/day

Reported range 50-300 mg/day

Route Oral

Frequency 1-3 times daily

Duration 4-6 week cycles (historical use)

Banned as a Schedule III controlled substance under the Anabolic Steroid Control Act of 2004; historical dosing shown for reference only.

Where this comes from Historical clinical pharmacokinetic studies (pre-2004); user-reported literature

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.