Limit your sugar-sweetened beverage intake if you are a teenager. An alarming study shows that daily consumption of beverages can impair your ability to learn and remember. Most of the beverages are sweetened with high-fructose corn syrup or sucrose. In experiments over rats researchers found that adult rats who consumed the sugar-sweetened beverages for one month performed normally in tests of cognitive function. However when consumption occurred during adolescence rats were impaired in tests of learning and memory capability. It is no secret that refined carbohydrates particularly when consumed in soft drinks and other beverages can lead to metabolic disturbances.