Figure 8. Measurement of Nrf2 expression in the aged brain and brains of animals fed GF diets. (A) Representative western blot of Nrf2 levels in the brains of aged rats subjected to control or GF diets. C, control; GF1, GF2, GF3, GF diets. Actin is used as a control for loading. (B) Quantified levels of Nrf2 in the brains of aged rats following feeding control diets or diets enriched with GF formulas. N = 20 per group. P<0.001.