Sleep and caffeine

Caffeine is a stimulant that can interfere with sleep by making it more difficult to fall asleep and stay asleep. Caffeine can also reduce the amount of deep sleep that you get, which is the most restorative stage of sleep. For these reasons, it is generally recommended to avoid consuming caffeine in the hours leading up to bedtime. The effects of caffeine can vary from person to person, but as a general rule, it is best to avoid caffeine for at least six hours before bedtime. Keep in mind that caffeine is not just found in coffee, but also in tea, soda, energy drinks, and chocolate, so it is important to check the labels of any foods or beverages that you consume. Additionally, some medications also contain caffeine, so it is important to talk to your doctor if you are concerned about the effects of caffeine on your sleep. A study also found that caffeine can delay the timing of your body’s internal clock. These effects will reduce your total sleep time.

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Sources:

The National Sleep Foundation:  https://www.thensf.org/ 
Sleep Foundation:  https://www.sleepfoundation.org/ 
American Academy of Sleep Medicine: https://aasm.org/