Here is what happens inside your brain when you fail to sleep tight for just one week:
Caffeine has a half-life of 5 to 6 hours. The quarter-life (the amount remaining when you try to sleep) is 10 to 12 hours. Sleep Tight
From that night on, Lily slept like a baby. She would read her book every evening, and then drift off to dreamland with ease. She felt refreshed and rejuvenated, and her parents were overjoyed to see her happy and well-rested. Here is what happens inside your brain when