Would you ever drink a cup of Starbucks® iced brewed coffee at 2:00 AM, then wonder why you can’t fall asleep? Well, you may as well be doing that if you start each day with a grande-size coffee streaming through your veins.
Here’s why… Caffeine has a lasting effect — a half life of five to six hours to be exact. In other words, it takes five to six hours for the amount of caffeine in your body to be reduced to exactly one-half of its concentration. (Translation: the amount of caffeine remaining in your body after six hours is equal to the amount you flush down the porcelain throne.)
See How It Breaks Down
Due to the half-life of caffeine and the amount of caffeine in one grande-size Starbucks® coffee, if you drank one every day at 8:00 AM, by Day 3 at 2:00 AM nearly 44 gm of caffeine could still be in your system. That’s equivalent to a 6-oz cup of Starbucks® iced brewed coffee. See how it’s calculated: “The Effects from Drinking One Starbucks® Grande Per Day for Three Days“.
Caffeine starts accumulating in your body when you consume caffeine throughout the day. This could be in the form of another drink, food or even medication.
If you drink a Starbucks® short (8-oz cup) at 2:00 PM every afternoon in addition to your 8:00 AM morning grande, by Day 3 at 2:00 AM, nearly 91 gm of caffeine could still be in your system. That’s equivalent to one 12-oz Starbucks® iced brewed coffee (a clue to why you may not be able to fall asleep during the week). See how it’s calculated: “The Effects from Drinking One Starbucks® Grande and One Short Per Day for Three Days“.
Your Personal Buzz (Half-Life Variables)
The half-life of caffeine is not a fixed number and can vary from three to over seven hours based on the individual. Variables include your: Continue reading “The Starbucks® Effect | Is Caffeine Shortening Your Life?”