• Platelet-derived growth factor—promotes blood vessel growth, cell replication, skin formation
• Transforming growth factor-b—promotes growth of matrix between cells, bone metabolism
• Vascular endothelial growth factor—promotes blood vessel formation
• Epidermal growth factor—promotes cell growth and differentiation, blood vessel formation, collagen formation
• Fibroblast growth factor-2—promotes growth of specialized cells and blood vessel formation
• Insulin like growth factor—a regulator of normal physiology in nearly every type of cell in the body