IGF1 and hyperinsulinemic hypoglycemia, familial, 4: It was proposed that IGF‐1 supplementation could be used to promote growth in adolescents with Crohn's disease and IGF‐1 deficiency, but since high IGF‐1 levels may be carcinogenic, it was important to ensure that the dosing would only correct levels up to the normal range and not too far beyond.