GHRP-6 (Growth Hormone Releasing Peptide – 6) is a 28-amino-acid peptide that indicates the human body to start secreting growth-hormone (GH). Growth Hormone in the human body has mass of beneficial effects such as decreased body fat, increased muscle, and increased strength and stamina. Thus, in several studies, when subjects were given GHRP-6, their muscle mass increased and their body fat was reduced significantly.

IGF stands for insulin-like growth factor. Insulin-like growth factor 1 (IGF-1) is a polypeptide protein hormone alike in molecular structure to insulin. It plays an important role in childhood growth and continues to have effects in adults. It is a natural substance that is produced in the human body and is at its highest natural levels during puberty. There are many different things that IGF does in the human body. Among the effects the most positive are increased amino acid transport to cells, increased glucose transport, increased protein synthesis, decreased protein degradation, and increased RNA synthesis.

Mechano Growth Factor (MGF) also known as IGF-1Ec is a growth factor/repair factor that is derived from exercised or damaged muscle tissue. MGF has been publicized to boost muscle mass by improving the capability of wasted tissue to develop and progress itself by activating muscle stem cells and increasing the up regulation of protein synthesis. MGF is a part of the IGF family, but, in the case of MGF, this part of the peptide acts as a separate growth factor involved in initiating muscle satellite (stem) cell activation in addition to its IGF-I receptor domain which increases protein synthesis, and hence improves muscle mass.