Amedical review published in the Steroids journal described Superdrol as "highly androgenic," which suggests that it may be effective for muscle-building given that higher levels of androgens (which are male sex hormones like testosterone) are associated with increased muscle mass.
Aresource page published on PubChem, which is a medical library maintained by the National Library of Medicine, describes Superdrol as a "testosterone congener" which means that it's a precursor to testosterone.
This suggests that taking Superdrol will increase testosterone levels, and increased testosterone is associated with increased muscle mass and reduced body fat (especially when combined with resistance training and proper diet).
Overall, we consider Superdrol likely to build muscle based on its chemical nature and its description in clinical studies, but we cannot find one single trial directly proving it to do so.
Some steroids do have clinical backing. As we documented in our review of Primobolan, several clinical trials tested that steroid on human participants.
