A form of testosterone replacement therapy medicine known by the brand name Sustanon 250 Cycle contains a combination of several testosterone esters. It is neither a performance-enhancing substance nor a supplement for building muscle, although it may indirectly stimulate muscle growth in people with low testosterone levels.

Testosterone Replacement: Sustanon is typically recommended to people with hypogonadism, a disorder marked by clinically low testosterone levels. The hormone testosterone is essential for bone strength, muscle growth, and general physical function. Low testosterone levels might impede muscular growth and recuperation.