date:Jun 20, 2013
dy to produce a critical protein called insulin-like growth factor 1, or IGF-1. This protein promotes growth and development and, as its name suggests, is similar in structure to the hormone insulin.
Previously, studies showed that the supplement helped increase muscle mass in patients with AIDS or cancer. These earlier findings led this study's investigators to hypothesize that the increased muscle mass could result from greater blood concentrations of IGF-1. They theorized that these increase