Insulin Growth Factor (IGF-1)


This blood test is used measure Insulin Growth Factor (IGF-I, or somatomedin C), is a protein that is regulated principally by growth hormone (GH) and can also be affected by nutritional intake. IGF-1 is a prime mediator of growth hormone (GH).

Growth hormone is made in the anterior pituitary gland, and travels to the liver, where it stimulates the liver to produce IGF-1. IGF-1 then helps motivate growth-promoting effects on almost every cell in the body; especially skeletal muscle, cartilage, bone, liver, kidney, nerves, skin, and lungs. It is molecularly similar to insulin and in addition to its insulin-like effects. IGF-1 helps to regulate cell growth and development, especially in nerve cells. IGF-1 also supports DNA synthesis.

Test Preparation For Optimal Results:

If possible, have the lab collected early in the morning or shortly after waking. For comparison purposes, have subsequent labs collected close to the same time.

Disclaimer: A health care provider should evaluate a deviation from normal.