Brown Rice Glycemic Index vs White Rice (68 vs 73)

Short answer: brown rice has a GI of 68, medium, compared with 73 for white rice, as reported by Harvard Health. The white rice value matches Atkinson 2008, Table 1.

Brown rice vs white rice

Measure	Brown rice	White rice
GI	68 (medium), Harvard Health	73 (high), Atkinson 2008
Carbs per 100 g cooked	25.6 g (USDA FDC 169704)	28.2 g (USDA FDC 168878)
Fiber per 100 g	1.6 g	0.4 g
Net carbs per 100 g	24.0 g	27.8 g
GL per 100 g, calculated	16 (medium)	20 (high)

Why brown rice is a bit lower

Brown rice keeps its bran, and USDA lists four times the fiber of white rice per 100 g cooked (1.6 g vs 0.4 g). The difference in GI is real but modest: both are rice, and portion size still drives glycemic load.