I remember back in first grade when one of my former teachers said that drinking coffee impairs youths ability to increase their height. That's bc coffee makes you restless at night.
3.2 years later from that time, I watched a Bright Side video that guided to follow the 8 hour rule: Don't drink coffee 8 hours before bed.
Yesterday and 2 days ago, I drank some coffee in the morning (the first time I did). Despite the 8 hour difference from yesterday's coffee and when I got to bed, for yesterday's night and today's early morning, I was insomniac.
Maybe I should've sticked to hot chocolate instead.