Coffee is Like a Bottle Rocket
The peak effect of caffeine on your body happens between 15 minutes and two hours after you consume it. When caffeine from coffee enters your bloodstream, you become more alert from an increase in the production of the hormones adrenaline and cortisol.
The problem is: if this over-stimulation of adrenaline and cortisol occurs too regularly, your adrenal glands— which absorb adrenaline to help make you feel energized—gradually begin to require more adrenaline to give you the same “pick-me-up” feeling as before.
When researchers at Johns Hopkins University looked at low to moderate coffee drinkers (as little as one 14-ounce mug per day), they found that even this little amount of coffee can cause your body to develop a tolerance to caffeine (and require more of it to get the same stimulation).
Just like the thrill of lighting a bottle rocket and watching it explode all within a few seconds, the good feelings associated with coffee are short-lived, and pretty soon you need another hit to feel good again.
