Table 2.

Effect of glycemic load on fasting glucose and insulin

	White normal	White obese	Black normal	Black obese
N	10	10	10	10
Fasting glucose (mg/dl)*
High GL	84.1 (8.7)	85.6 (9.4)	80.8 (5.4)	86.9 (7.8)
Low GL	82.8 (9.0)	87.2 (14.9)	79.8 (6.8)	88.2 (7.2)
Δ Fasting glucose (mg/dl)
High GL	−0.8 (4.0)	−4.8 (8.6)	−2.9 (7.8)	−9.6 (6.9)
Low GL	−2.1 (4.0)	−3.2 (5.8)	−3.9 (7.9)	−8.3 (7.0)
Fasting insulin (μU/ml)**
High GL	8.2 (4.6)	13.3 (8.9)	9.6 (3.1)	14.0 (7.8)
Low GL	5.6 (2.9)	13.0 (7.9)	9.6 (5.3)	18.6 (12.6)
Δ Fasting insulin (μU/ml)
High GL	−0.8 (2.9)	−6.6 (10.8)	−0.6 (6.4)	−13.2 (22.5)
Low GL	−2.7 (2.5)	−7.2 (11.3)	−0.9 (5.9)	−10.5 (18.2)

Δ = Change relative to level at study entry (Table 1). Data are expressed as mean (s.d.).

GL, glycemic load.

Obese (n = 20) vs. normal weight (n = 20):

^*P < 0.02,

^**P < 0.0003.

Blacks (n = 20) vs. whites (n = 20): Ps > 0.09. Obesity × Race interactions: Ps > 0.36. Diet × obesity × race interactions: Ps > 0.47.