Other regarding foods reduced in GI are grains, cereals, and bran. Spaghetti and rice are okay too. They've relatively low GIs as compared with white bread, white flour products and sugar-coated cereals like associated with Kelloggs. Foods with higher GI release sugar much faster into the blood stream causing the so-called "sugar rush" and minutes beyond this concept follows the "sugar crash". This making you feel lethargic and more slowly. It will prevent you from working well on your mental tasks or those tasks which entail a large number of Brain Booster thinking.