Yes, and it makes sense. When used together with somatotropin, the effects of active substances are summed up for muscle growth and for the restoration of cartilage, as well as other collagen structures. Plus insulin-like growth factor and growth hormone affect the fat burning process in different ways.
The former reduces tissue insulin resistance, while the latter utilizes fatty acids from the blood. That is, in tandem, the drugs accelerate the process of getting rid of fat.
When used together with anabolic steroids, IGF-1 enhances their effect by increasing the number of androgen receptors in the body.