IGF-1 (Insulin-like Growth Factor 1) is a hormone mainly produced by the liver in response to growth hormone (GH) from the pituitary gland. It helps regulate growth, cell repair, and metabolism, and plays an important role in muscle development, bone strength, and tissue regeneration. Doctors often measure IGF-1 levels in blood tests to evaluate growth hormone activity, which can help diagnose conditions like growth hormone deficiency or excess (such as acromegaly).

Fasting NOT required.