Methods: n = 10 healthy male subjects are equipped with catheters in aa. femorals and vv. femorals bilaterally under local anaesthetics. Each study comprises a 3-hour basal period and a 3-hour period with hyperinsulinaemic-euglycaemic clamp. During the test, samples of arterial and venous blood and 4 muscle biopsies are obtained. The intervention contain continues saline infusion compared to either amino acids (Vamin) or 3hydroxybutyrate solution FFa-3OHB.