TABLE 1.

Plasma arterial concentrations of insulin, hGH, and IGF-I

	Young		Elderly		ANOVA (P value)
	Basal	Amino acids with glucose	Basal	Amino acids with glucose	Effect of age	Effect of mixture	Interaction
Insulin (pmol/L)	38 ± 4	196 ± 25	20 ± 2	154 ± 18	0.084	<0.0001	0.47
hGH (μg/L)	2.04 ± 1.32	0.13 ± 0.04a	0.60 ± 0.16	0.74 ± 0.22	0.56	0.22	0.16
IGF-I (μg/L)	167 ± 12	180 ± 22	96 ± 7	94 ± 6	0.003	0.73	0.23

Arterial insulin, hGH, and IGF-I concentrations in normal young and elderly individuals in the basal state and during the intake of an amino acid-glucose mixture. Data are the means ± SE.

^aP = 0.076 vs. young basal.