Winstrol, also known as Stanozolol, is a synthetic anabolic steroid derived from dihydrotestosterone (DHT). It was first developed in the 1960s by Winthrop Laboratories and has been approved for human use by the Food and Drug Administration (FDA).

Winstrol is commonly used by athletes and bodybuilders to enhance athletic performance, increase muscle mass, and improve overall physique.

It is known for its ability to promote strength gains without significant increases in weight, making it popular among those looking to maintain a specific weight class or improve their strength-to-weight ratio.