For many biological processes, the Goldilocks Principle rules. You don’t want too much, or too little, of something, you want it just right. So it is with the body’s delicate concentration of growth factors. Too much of a signaling protein called insulin-like growth factor-I (IGF-I) may fan the flames of cancer, while too little of the protein may cause short stature, dementia and osteoporosis, among other problems.>>> Discuss This Story
