IGF-1 (Insulin-like Growth Factor 1)

Insulin-like Growth Factor 1, also known as IGF-1, is used as a biomarker for blood levels of human growth hormone. It is a hormone produced by the liver and other tissues which affects growth-promoting activities and glucose metabolism. The blood level of IGF-1 appears to be constant over 24 hours and is found to be related to growth hormone secretion.