Peak GH secretion after stimulation was inversely associated with fasting insulin (R = −0.650, P = .012), HOMA-IR (R = −0.846, P = .001), total cholesterol (R = −0.532, P = .034), and LDL cholesterol (R = −0.692, P = .006) and positively associated with HDL cholesterol (R = 0.561, P = .037).These data strongly suggest a role for insulin resistance in the decreased GH secretion of obesity and that the blunted GH secretion of central obesity could be the pituitary expression of the metabolic syndrome. This evidence concerns the gene GH1 and Insulin resistance.