OPK-88004 Reference

Plain English

What it is

OPK-88004 is a SARM, a lab-made drug that targets the body's muscle-building hormone signals. It is sold only as a research chemical, not as an approved medicine, and no SARM has FDA approval.

What people use it for

In bodybuilding and body-recomposition circles it is sometimes talked about for building muscle and losing fat, but that is only anecdotal and is not an approved use. Real-world interest in it is small and stretches far beyond what the research actually tested.

What the science shows

It reached a small, short human trial, but the people studied were prostate-cancer survivors, not athletes. In that study it raised lean body mass and lowered body fat, yet it did not improve sexual symptoms or physical performance, and it proved no approved benefit.

The catch

The FDA warns the public against SARMs, which are sold illegally and are often mislabeled, and anti-doping rules ban them in sport at all times as anabolic agents (WADA class S1.2). The maker's own testing saw liver enzymes rise in some men. Like other SARMs it can suppress the body's natural testosterone and affect cholesterol and heart health.

Reference summary

A randomized trial in prostate-cancer survivors evaluated sexual symptoms, body composition, and physical function. It did not establish broad clinical benefit or an approved indication.

Regulatory and posture

Categories

SARM, Hormonal

Aliases

OPK88004, 4-chloro-17α-methyl-andro-4-ene-3β,17β-diol, Steroidal SARM

Evidence posture

human - Human trial context was prostate-cancer survivorship, not bodybuilding. Published results do not validate community sexual-function, testosterone-replacement, or performance claims. WADA-prohibited; no FDA approval.

Regulatory status

No FDA-approved OPK-88004 drug label. FDA consumer warnings against SARMs sold in bodybuilding products apply to the class. WADA prohibits SARMs under category S1.2 anabolic agents at all times.

Content review status

research reference