Question

If i drink coffee tonight, i don't sleep well.

Answer 1

Answer:

because you are having it's habit

Answer 2

Answer:

Caffeine can impact the onset of sleep and reduce sleep time, efficiency, and satisfaction levels. Older adults may also be more susceptible to caffeine-induced sleep troubles.

Explanation:

When we consume caffeinated drinks and foods, our stomachs and small intestines quickly absorb the caffeine. The effects of caffeine are measured by its half-life, which typically ranges from 4-6 hours. The half-life means the time that your body has metabolized, or processed through, half the caffeine you consumed. As a result, the six-hour half-life of a caffeinated beverage you consume in the afternoon could keep you up at night.