is green tea good for sleep

is green tea good for sleep

Is Green Tea Good for Sleep?

Green tea is a popular beverage in many cultures around the world and has been linked to numerous health benefits, such as improved digestion and concentration. One such claimed benefit is that it may help people to sleep better. However, is there any scientific evidence to back this up?

The Science Behind Green Tea and Sleep

Green tea contains an amino acid called theanine. Studies have shown that theanine can improve sleep quality by increasing the level of serotonin, a neurotransmitter that regulates mood and sleep-wake cycles. Theanine also reduces alpha wave activity in the brain, leading to a calm, relaxed state. Other studies suggest that green tea can improve sleep by increasing levels of the human growth hormone, which promotes deep sleep.

How to Use Green Tea for Sleep

If you want to try using green tea for sleep, here are a few tips:

  • Avoid caffeine: Green tea contains caffeine, which can interfere with sleep if consumed too late in the day. Aim to drink green tea earlier in the day and limit your intake to no more than 200mg per day.
  • Drink a cup before bed: Drinking a cup of green tea an hour or two before bedtime can help to promote a restful sleep.
  • Choose decaffeinated green tea: If you are sensitive to caffeine, opt for decaffeinated green tea to avoid potential sleep disturbances.


Overall, green tea definitely has the potential to improve sleep quality through its calming and restorative properties. However, it’s important to remember not to drink green tea too late in the day to avoid any potential interference with your sleep.


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