Caffeine s half-life is three to five hours, meaning it is still active in your body long after you ve had your last caffeinated drink of the day. Caffeine disrupts sleep. Immediately after you ingest caffeine it becomes much harder to fall asleep. If you drink coffee toward the end of your shift, you may have trouble falling asleep when you get home, and the quality of your sleep may also suffer. Also, caffeine is both a diuretic and laxative, so it increases the chances that you ll get up to use the bathroom.
Caffeine is addictive.
When heavy users stop using it suddenly, they often experience withdrawal symptoms such as headaches, nausea and mild depression. Excessive consumption may lead to health problems. Most studies have not tied health problems to moderate caffeine consumption. Instead of automatically heading for the coffee pot whenever you re tired, map out a caffeine strategy you adhere to night after night. Set a cutoff point.