Did you know on average feeling alert after a cup of coffee can last up to 6 hours? So with that in mind when is the best time to drink coffee? Researchers and nutritionalists say it might depend on a few things, like your age & your body's biology. Things like age, ethnicity and culture can affect which time of day is best for you. For example, for young adults, a morning coffee may help boost performance. For older adults, an afternoon coffee may be a better idea.
Tamar Samuels a registered dietitian said, quote, “You can be strategic about when you have your caffeine depending on when you need to feel most alert throughout the day.“
Also, just because the coffee wakes up your brain, doesn't mean it will wake up the rest of your body leaving you alert, but feeling sluggish. You have to find that sweet spot that's perfect for you & your body.
To do this, Zhaoping Li, a professor of medicine and chief of the division of clinical nutrition at the University of California, Los Angeles, suggests, drinking coffee at different hours of the workday and seeing how you feel.