Sugary foods, such as cornflakes with two spoonful s of sugar, accompanied by a waffle and maple syrup, had a high GL and led to a slump in performance by late morning.

• 比如脆玉米片加上两勺糖，配合华夫饼干和糖枫汁等糖类食品含有高血糖负荷量，会导致一上午的表现处于消沉状态。