If you are indeed the type of person who NEEDS their coffee as soon as they get up, this might not be wonderful news for you. So why is 10 AM the best time? Well, according to research from AsapScience, our cortisol levels peak between 8 and 9 AM; cortisol is the "stress hormone" which is how our bodies naturally wake themselves up.
If you are sipping your coffee during this time, the effect of the caffeine is not helpful.
Aside from 8-9 AM, our peak cortisol times are 12-1 PM (during most of our lunch times), and then at 5:30-6:30 PM.
We should mention that if you are waking up very early or much later than the average person (who wakes up between 7-8 AM), then your peak cortisol times are going to be different. If you are one of these people, just know your peak cortisol time is about an hour after waking up.
fresh ground coffee at home! Or even if you go out and buy your Starbucks coffee or another brand, as long as it's coffee!