Eating fruit can relieve sleepiness caused by many factors such as disturbances in blood sugar or oxygen levels in the body. If the drowsiness caused by lack of energy or oxygen in the body it will make a person difficult to concentrate and can not focus on his work. This condition is often prevented by drinking coffee, but you should change this habit by eating fruits that are known to be more beneficial for the body.
If someone is impaired blood sugar levels or intake of oxygen to the brain decreases then it will make him feel limp, yawning frequently, drowsiness, and also can not concentrate. One of the ways you can do is to keep blood sugar levels remain stable and the intake of oxygen to the brain remains smooth.
Fruits like apples, oranges, pears and avocados could help keep blood sugar levels remain stable, thereby preventing a person feel weak, as quoted from nhs.uk, Wednesday (03/23/2011).
While the fruits that contain high water content is known to prevent the body become dehydrated which can keep the intake of oxygen to the brain not to be reduced so that someone does not feel sleepy.