A good sleep after a cup of tea? Even coffee? Cool beans!

World

A good sleep after a cup of tea? Even coffee? Cool beans!

However, nicotine at night may not be such a good idea

Sarah Knapton

Caffeine is a known powerful stimulant that perks up drinkers, increases alertness and promotes wakefulness.

Yet a surprising new study has found drinking tea or coffee within four hours of bedtime does not affect sleep at all.

Researchers from Florida Atlantic University and Harvard Medical School recorded how much caffeine, alcohol and nicotine 785 volunteers consumed and compared their sleep diaries and wrist sensors...

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